Coin Factory

Part of the Roblox Game Scripting section of Coddy's Lua journey. Lesson 8 of 25.

A table holds a list of values in curly braces, and a for loop can visit each one:

local heights = { 4, 8, 12 }
for _, h in heights do
	print(h)
end

This prints 4, 8 and 12. Each round, h holds the next value. The _ is the position in the list, which this loop does not need.

Combine a table with a function and you get a factory: one call per value.

local function makeTree(x)
	-- build a tree at x
end
for _, x in { -10, 0, 10 } do
	makeTree(x)
end

CanCollide = false lets players walk through a part; it is still there and still visible.

A Folder groups parts, like workspace.Coins. Setting a part's Parent to a folder puts it in the world inside that folder.

Challenge

Easy

Finish the coin factory: makeCoin(z) builds one gold coin, and a loop calls it for every number in spots.

In makeCoin, add coin.CanCollide = false and coin.Anchored = true.
Add coin.Position = Vector3.new(0, 3, z), then coin.Parent = workspace.Coins.
Below the function: for _, z in spots do makeCoin(z) end.

Press Play: five gold coins float in a line. Then Check.

Try it yourself

local spots = { 12, 6, 0, -6, -12 }

local function makeCoin(z)
	local coin = Instance.new("Part")
	coin.Name = "Coin"
	coin.Shape = Enum.PartType.Ball
	coin.Size = Vector3.new(2, 2, 2)
	coin.Color = Color3.fromRGB(255, 200, 40)
	-- 1. Walk-through and anchored
	-- 2. Position at (0, 3, z), then put it in workspace.Coins
end

-- 3. Call makeCoin for every spot

All lessons in Roblox Game Scripting

1Scripts and Parts

Hello, Roblox Paint a Part Stretch the Bridge Build a Platform

4Game Mechanics

Speed Pad Jump Pad Click Me The Button Door Moving Platform Checkpoints Finish Line

2Loops and Functions

Row of Pillars Staircase Builder Tower BuilderCoin FactoryBlinking Light Vanishing Bridge

5Your First Game

Your First Obby

3Events and Players

Touch Pad Lava Floor Leaderstats Who Touched It?Coin Collector Coin Respawn Coin Door

Practice on your own: Online Lua compiler