Gold Ore

Lesson 5 of 18 in Coddy's Roblox Game: Factory Tycoon course.

A little luck keeps players watching the belt: some ore is gold, worth five times as much. math.random() with no arguments returns a number from 0 up to (not including) 1, so it is below 0.1 one time in ten:

if math.random() < Settings.GoldChance then
	-- this one is gold
end

Gold ore glows (Neon) and is worth Settings.OreValue * 5. This lesson's settings make gold common, so you see plenty.

Some ore will fall off the belt over the game's life. Debris:AddItem(ore, 20) removes each ore after 20 seconds, wherever it ended up, so the world never fills with stray parts.

Challenge

Easy

In dropOre:

If math.random() < Settings.GoldChance, make the ore gold: Color3.fromRGB(255, 200, 40), Neon, and a Value of Settings.OreValue * 5.
After parenting the ore, have the Debris service remove it after 20 seconds.

Press Play and watch for gold, then Check.

Try it yourself

local Players = game:GetService("Players")
local Settings = require(game.ReplicatedStorage.Settings)

local tycoon = workspace.Tycoon

print("Ore is worth " .. Settings.OreValue .. " Cash")

-- Every player gets Cash on the leaderboard
Players.PlayerAdded:Connect(function(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player

	local cash = Instance.new("IntValue")
	cash.Name = "Cash"
	cash.Parent = leaderstats
end)

-- Ore: a small part worth Cash, dropped under a dropper
local function dropOre(dropper)
	local ore = Instance.new("Part")
	ore.Name = "Ore"
	ore.Size = Vector3.new(1, 1, 1)
	ore.Color = Color3.fromRGB(150, 150, 160)
	ore.Position = dropper.Position - Vector3.new(0, 2.5, 0)
	ore:SetAttribute("Value", Settings.OreValue)
	ore.Parent = workspace
end

local function startDropper(dropper)
	task.spawn(function()
		while dropper:IsDescendantOf(workspace) do
			dropOre(dropper)
			task.wait(Settings.DropInterval)
		end
	end)
end

startDropper(tycoon.Dropper)

-- The conveyor carries whatever rests on it
tycoon.Conveyor.AssemblyLinearVelocity = Vector3.new(Settings.BeltSpeed, 0, 0)

-- The collector turns ore into Cash
tycoon.Collector.Touched:Connect(function(hit)
	if hit.Name == "Ore" then
		local value = hit:GetAttribute("Value")
		hit:Destroy()
		for _, player in Players:GetPlayers() do
			player.leaderstats.Cash.Value += value
		end
	end
end)