Roblox, lua, for loop, while loop, change color, random

ArrayTest.lua

local cubes = game.Workspace.ColorCubes:GetChildren()

for i = 1, #cubes do
	cubes[i].Color = BrickColor.Random().Color
end

local function changeColor() 
	r1 = math.random(0.0, 1.0)
	r2 = math.random(0.0, 1.0)
	r3 = math.random(0.0, 1.0)
	return Color3.new(r1, r2, r3)
end
local iter = 1

while iter < 20 do
	for i = 1, #cubes do
		cubes[i].Color = changeColor()
	end
	wait(1)
	iter += 1
end