Stage 7: Fireball Factory

Roblox Studio · Creator QuestStage 7 of 10

~70 min0/4 proofs0 XPRookie Builder

Quest objectiveBuild a fair cannon lane with a reusable function

Your beam keeps its rhythm, saved at Checkpoint_07. Ahead, your game starts manufacturing danger: a cannon that builds a new projectile every few seconds — powered by your first function.

Narration transcript

1. Stage Six taught a beam to keep a rhythm, saved at Checkpoint zero seven. Keep that tested checkpoint open. Stage Seven begins there.
2. Build a cannon lane with real cover, learn functions, and ship a fair crossing under fire.
3. Spoken bridge: Mission ready. First, understand the idea that makes this stage work.

Build

a cannon lane with real cover

Learn

how a function packages reusable instructions

Ship

a fair crossing under fire

Listen to the guided pathHandoff → mission → idea → logic → build → does it pass → make it yours → learn → prove → reward

Speed0.8×1×1.2×Friendly guide (device voice)

Starts only when you press Read this. The guide pauses while you build and saves your place on this device. Help answers stay on demand.

Idea

Narration transcript

1. A function packages instructions under one name so you can run them again and again. launchFireball builds a ball, aims it from Muzzle toward FireballTarget, and cleans it up — and a loop calls that function forever. Names matter here: the script finds its target by name.
2. Spoken bridge: Turn that idea into three small Logic Cards.

A function gives a group of instructions one name. Our launchFireball() will create a ball, style it, aim it, react to touch, and schedule cleanup — and the loop only needs to call that name, forever.

Two names matter today more than anything else: the script finds its aim point with stageFolder:WaitForChild("FireballTarget"), so Muzzle and FireballTarget must be spelled exactly and sit as siblings in your stage folder. Where you put them is your design; what they're called is the deal you make with your code.

This is a longer script, so build it in tested layers. Never debug the whole factory at once.

Sample goal

Build toward this: One way Stage 7 can look — this one fires down the lane. The reference build fires across it instead. Your lane, your cover, your projectile — what matters is a fair crossing.

Logic Board

Logic board

Finish these cards from left to right. Each card becomes a Code Quest below.

1. 1Card A
   Narration transcript

   1. Make and style one fireball inside a function.
   2. Calling the function creates a visible ball.

   Create the product

   Make and style one fireball inside a function.

   Done when: Calling the function creates a visible ball.
2. 2Card B
   Narration transcript

   1. Launch the ball, react to touch, and clean up.
   2. The ball flies the lane and never piles up.

   Launch and clean

   Launch the ball, react to touch, and clean up.

   Done when: The ball flies the lane and never piles up.
3. 3Card C
   Narration transcript

   1. Run the factory on a loop and save the checkpoint.
   2. A steady rhythm launches and Checkpoint zero eight saves.
   3. Spoken bridge: The plan is complete. Pick your Build Mode on the page and build one card at a time — pause after every Studio action.

   Run the factory

   Run the factory on a loop and save the checkpoint.

   Done when: A steady rhythm launches and Checkpoint_08 saves.

Build

Pick your Build Mode for the arena — the function is the same for everyone. Watch the two exact names.

Build Mode

Every builder plays this stage in their own mode. Which sounds like you?

Not sure? Start with Guided — you can level up on any stage, and your pick follows you through the whole course.

The wiring

Names that must match

Build inside Workspace → Course → Stage07, from Checkpoint_07 to Checkpoint_08. Scripts find objects by name — these spellings are the wiring. Everything else about each object is your call.

• FireballPathThe open lane the fireballs sweep.
• Cover_1A cover object big enough to fully block a fireball.
• Cover_2A second cover object, spaced for cover-to-cover advances.
• BarrelThe visible cannon — pure decoration, style it your way.
• MuzzleInvisible helper the script fires from. The exact name matters.Must have: Transparency 1 · CanCollide false · Script: FireballController
• FireballTargetInvisible helper the script aims at. Must be Muzzle's sibling with this exact name — the script calls stageFolder:WaitForChild("FireballTarget").Must have: Transparency 1 · CanCollide false
• Landing_08The landing that ends the stage — Checkpoint_08 stands here.

Reference buildStuck, or just want to copy ours? Here is exactly how we built this stage.

These values always work together. Copy them as-is, or borrow a few and keep the rest of the stage yours.

Build this part

FireballPath

Part · Block

Open recipe

Size

12 × 1 × 56

Anchored

✓ Yes

Orientation

0 × 0 × 0

CanCollide

✓ Yes

Place

Position [0, 3.5, 432] inside Workspace → Course → Stage07

Build this part

Cover_1

Part · Block

Open recipe

Size

9 × 8 × 2

Anchored

✓ Yes

Orientation

0 × 0 × 0

CanCollide

✓ Yes

Place

Position [-1.5, 7.5, 435] inside Workspace → Course → Stage07

Build this part

Cover_2

Part · Block

Open recipe

Size

9 × 8 × 2

Anchored

✓ Yes

Orientation

0 × 0 × 0

CanCollide

✓ Yes

Place

Position [1.5, 7.5, 441] inside Workspace → Course → Stage07

Build this part

Barrel

Part · Cylinder

Open recipe

Size

6 × 3 × 3

Anchored

✓ Yes

Orientation

0 × 0 × 0

CanCollide

✓ Yes

Place

Position [-14, 6, 438] inside Workspace → Course → Stage07

Build this part

Muzzle

Part · Block

Open recipe

Size

1 × 1 × 1

Anchored

✓ Yes

Orientation

0 × 0 × 0

CanCollide

✗ No

Transparency

1

Place

Position [-9, 6, 438] inside Workspace → Course → Stage07

Children: Script: FireballController.

Build this part

FireballTarget

Part · Block

Open recipe

Size

1 × 1 × 1

Anchored

✓ Yes

Orientation

0 × 0 × 0

CanCollide

✗ No

Transparency

1

Place

Position [9, 6, 438] inside Workspace → Course → Stage07

Build this part

Landing_08

Part · Block

Open recipe

Size

12 × 1 × 12

Anchored

✓ Yes

Orientation

0 × 0 × 0

CanCollide

✓ Yes

Place

Position [0, 3.5, 465] inside Workspace → Course → Stage07

Code

Build quest · Card A

Create one fireball

Narration transcript

1. Build your factory per your track — the open lane, at least two real covers, a decorative cannon, and the two invisible helpers named exactly Muzzle and FireballTarget, level with each other on opposite sides of the lane. Then insert FireballController inside Muzzle and type the function that creates one styled ball. Call it once, temporarily.
2. Spoken bridge: Card A now matches its success check. Continue to Card B.

A — Create the product. Build your factory per your track. Then insert a Script inside Muzzle, rename it FireballController, and type the function that creates one styled ball. Temporarily add launchFireball() at the bottom and press Play: one ball appears at the muzzle and drops out of the sky. That's right — it has no engine yet; Card B gives it one. Remove the temporary call.

local muzzle = script.Parent
local stageFolder = muzzle.Parent
local target = stageFolder:WaitForChild("FireballTarget")
local Debris = game:GetService("Debris")
local ballSpeed = 35
local launchDelay = 2

local function launchFireball()
  local ball = Instance.new("Part")
  ball.Shape = Enum.PartType.Ball
  ball.Size = Vector3.new(3, 3, 3)
  ball.Material = Enum.Material.Neon
  ball.Color = Color3.fromRGB(255, 100, 0)
  ball.CanCollide = false
  ball.Position = muzzle.Position
  ball.Parent = workspace
end

Build quest · Card B

Move, react, and clean up

Narration transcript

1. The function packages the whole product: create, aim, launch, react, clean up. Debris is the cleanup crew.
2. Add the aim line, the touch reaction, and the Debris cleanup before the function's end, then call it once more.
3. Spoken bridge: The behavior passed its focused test. Finish the checkpoint handoff.

The function packages the whole product: create, aim, launch, react, clean up. Debris is the cleanup crew — no factory should fill Workspace with old products.

B — Launch and clean. Add these lines before the function's end, then call it once more. The ball should always travel from Muzzle toward FireballTarget and disappear on impact or after four seconds. If it flies diagonally, realign the two helper parts — fix parts, not code.

  local direction = (target.Position - muzzle.Position).Unit
  ball.AssemblyLinearVelocity = direction * ballSpeed

  ball.Touched:Connect(function(otherPart)
    if otherPart == muzzle then return end
    local humanoid = otherPart.Parent:FindFirstChildOfClass("Humanoid")
    if humanoid then
      humanoid.Health = 0
    end
    ball:Destroy()
  end)

  Debris:AddItem(ball, 4)

Build quest · Card C

Run the factory loop

Narration transcript

1. Add the factory loop after the function. Tune ballSpeed or launchDelay only after it works. Then add Landing zero eight and complete the Checkpoint zero eight recipe.
2. Spoken bridge: The next checkpoint saved. One designer check before you style it: does your stage pass?

C — Run the factory. After the function, add the loop below. Tune ballSpeed or launchDelay only after the factory works. Then add an anchored Landing_08 past the lane (reference: [12, 1, 12]) and complete the checkpoint recipe.

while true do
  launchFireball()
  task.wait(launchDelay)
end

Compare your finished script

local muzzle = script.Parent
local stageFolder = muzzle.Parent
local target = stageFolder:WaitForChild("FireballTarget")
local Debris = game:GetService("Debris")
local ballSpeed = 35
local launchDelay = 2

local function launchFireball()
  local ball = Instance.new("Part")
  ball.Shape = Enum.PartType.Ball
  ball.Size = Vector3.new(3, 3, 3)
  ball.Material = Enum.Material.Neon
  ball.Color = Color3.fromRGB(255, 100, 0)
  ball.CanCollide = false
  ball.Position = muzzle.Position
  ball.Parent = workspace

  local direction = (target.Position - muzzle.Position).Unit
  ball.AssemblyLinearVelocity = direction * ballSpeed

  ball.Touched:Connect(function(otherPart)
    if otherPart == muzzle then return end
    local humanoid = otherPart.Parent:FindFirstChildOfClass("Humanoid")
    if humanoid then
      humanoid.Health = 0
    end
    ball:Destroy()
  end)

  Debris:AddItem(ball, 4)
end

while true do
  launchFireball()
  task.wait(launchDelay)
end

Checkpoint recipeSave progress at Stage 8

Using the voice guide? It reads one recipe step, waits while you work, then continues when you choose Done — hear next step.

1. Insert one SpawnLocation in Workspace and rename it Checkpoint_08. Set Size to about [6, 1, 6] and Anchored to true. Centered on the landing that ends Stage 7, with its top just above the landing surface. (Our reference build puts it at Position [0, 4.5, 465].)
2. Set Neutral to false, Enabled to true, and AllowTeamChangeOnTouch to true.
3. Set the SpawnLocation TeamColor to Earth green. Set its visual BrickColor to the same named color. TeamColor controls respawning; BrickColor only controls what the pad looks like.
4. Point at Teams in Explorer, select its +, and insert one Team named Stage 8. Set its TeamColor toEarth green and AutoAssignable tofalse. Never reuse this TeamColor on another checkpoint.
5. Press Play. Climb to and touch Checkpoint_08, then reset your character and confirm you respawn there. Press Stop before editing again.

Explorer checkWorkspace → Checkpoint_08Teams → Stage 8 (Earth green)

Does It Pass?

Narration transcript

1. Time for the designer check. Play your factory and walk the pass list: fireballs fly the lane at chest height, there is no way around, every cover keeps you out of the firing line, and a patient player can cross fairly. A rule that fails is just the next thing to tune.
2. Spoken bridge: Your stage passes — it is a real level now. Time to make it feel like your game.

Designer check

Does your stage pass?

Play your stage and check each one. A rule that fails isn't a mistake — it's just the next thing to tune.

• Nothing moves, falls, or drifts — every part stays exactly where you put it.Check: Press Play — everything stays put.Tip: Anchored on for every part, and CanCollide on for anything players stand on.
• Muzzle and FireballTarget sit level with each other on opposite sides of the lane, so every fireball flies the straight line between them across the path.Check: Watch a fireball fly straight down the lane at chest height.Tip: About 2–3 studs of air between the path and the flight line puts every shot at body height.
• The path from the checkpoint to the landing passes through the fireball lane — there is no route around it.Check: Try to sneak past outside the lane: you can't.
• At least two covers — one before the firing line, one after — each keeping you fully out of the line and too tall to hop over.Check: Hide behind each cover through a shot untouched, then cross fairly.Tip: Keep every cover half a stud clear of the firing line itself, or it will eat the fireballs.

Make It Yours

Narration transcript

1. Restyle the danger: the fireball's color and material lines in the script are yours to change, and the cannon is pure decoration. Snowballs, meteors, cursed pumpkins — make the factory manufacture your world's danger.
2. Spoken bridge: That is your stamp on the stage. Now explain what made it work.

What does your world shoot? Snowballs, meteors, cursed pumpkins? The ball's Size, Material, and Color lines in the function are yours to restyle — and the cannon is pure decoration. Change the look, keep the aim line and cleanup untouched, and your factory manufactures your world's danger.

Help Ladder

Stuck? Choose what went wrong

Pick the problem that matches. Open one clue, try it, then return only if you still need help.

My parts overlap or miss the next checkpoint

Clue 1: small hint

Narration transcript

1. Stop Play mode and check one part against the stage rules before touching anything else.

Stop Play mode. Fix one part at a time instead of dragging the whole stage.

Clue 2: where to look

Narration transcript

1. Check Workspace, Course, Stage zero 7, and keep both checkpoints directly inside Workspace.

Find the stage parts in Workspace → Course → Stage07. Find Checkpoint_07 and Checkpoint_08 directly inside Workspace.

Clue 3: worked answer

Narration transcript

1. Walk your stage rules top to bottom and fix the first rule that fails. If you want a layout that always works, open the reference build and copy its values.

Rebuild the connection one part at a time: check each part against the stage rules, or re-enter its reference Position from the matching recipe card if you want the layout that always works. Then playtest again from Checkpoint_07.

my fireballs vanish partway down the line

Clue 1: small hint

A fireball dies the moment it touches anything — check what's in its flight path.

Clue 2: where to look

Watch one launch from the side in Play mode and note exactly what the ball touches first.

Clue 3: worked answer

Move any part out of the firing line between Muzzle and FireballTarget — half a stud of clearance is enough. Cover belongs just before and just after the line, never in it.

no fireballs appear

Clue 1: small hint

Narration transcript

1. Test the factory before testing movement.

Test the factory before testing movement.

Clue 2: where to look

Narration transcript

1. Put one temporary launchFireball call after the function and watch Output.

Put one temporary launchFireball() after the function and watch Output.

Clue 3: worked answer

Narration transcript

1. Confirm every creation line is inside the function, ball dot Parent equals workspace comes before the function ends, and the loop calls the exact name launchFireball.

Confirm every creation line is inside the function, ball.Parent = workspace comes before the function ends, and the loop calls the exact name launchFireball().

Learn What Happened

Narration transcript

1. One function fired every shot: build, aim, launch, clean up — packaged under one name and called on a loop. You changed the style lines and the logic stayed true. That separation is what makes code reusable.
2. Spoken bridge: Use one small prediction to transfer that idea.

The function described one complete product; the loop decided when to make another. Debris kept old fireballs from filling Workspace. And when you restyled the ball, the logic didn't care — style lines and logic lines live in the same function but do different jobs. That separation is what makes code reusable.

Try This

Narration transcript

1. Predict what changing ballSpeed does to fairness, compare with one playtest, and connect the result to the function's aim line.
2. Spoken bridge: Finish with four proof checks. Each check must match something you can observe or explain.

Learning beat

Try this

Three short thinking checks. Use evidence from the stage you just built.

Predict first

What happens to Workspace if the cleanup line is removed?

Compare

Try a fast ball every three seconds and a slow ball every second. Which is scarier — and which is fairer?

Connect

Which Logic card is the function, and which card is the loop?

Prove It

Narration transcript

1. Spoken bridge: Final proof. Confirm one result at a time.
2. Your cannon fires from Muzzle toward FireballTarget across the path, and players can hide behind real cover.
3. Fireballs move, damage, clean up, and leave a fair crossing.
4. Checkpoint_08 saves progress and reset returns you there.
5. You can explain the function, loop, and cleanup step.

Mission check · finish all 4

✓Your cannon fires from Muzzle toward FireballTarget across the path, and players can hide behind real cover.✓Fireballs move, damage, clean up, and leave a fair crossing.✓Checkpoint_08 saves progress and reset returns you there.✓You can explain the function, loop, and cleanup step.

0 of 4 proof checks complete

Narration transcript

1. Stage Seven complete. You packaged danger into a function and earned one hundred XP. Stage Eight makes the whole arena spin.

XP

Your next milestone

Finish the checks above

You packaged danger into a function your loop can call forever — and styled it your way.

4 proof checks left. The final check automatically awards 100 XP.

Go Further (Optional)