Need help for color changing brick script?

This script could help you

local part = script.Parent -- The part you want it to change color
local a  = 0
while true do --loop
repeat --repeat
    a = a  -1

    part.Color = Color3.new(a,a,a)
    wait(0.1)

until a == 255 --Repeat untill the part is white
a=0 -- set back to 0
part.Color = Color3.new(0,0,0) -- Set the part back to black
wait(1) -- The delay
end

I know it's annoying to say such, but you should at least have tried to start a loop or something, having to do an entire script makes it a request, and this isn't what this website is about. but anyways, hope this helps.

Brick = script.Parent -- Gets your brick if the script is it's parent
Color = 0 
Debounce = false

function ChangeColor() 
while true do -- loops the other loops
   while Color < 255 and not Debounce do
      Color = Color + 1
      Brick.Color = Color3.fromRGB(Color,Color,Color)
      print(Color)
      wait(0.01)
   end
   Debounce = true
   while Color > 0 and Debounce do
      Color = Color - 1
      Brick.Color = Color3.fromRGB(Color,Color,Color)
      print(Color)
      wait(0.01)
   end
   Debounce = false
wait()
end
end

ChangeColor() -- Calls the function

I wasn't really able to formulate comments that would fit, so basically it calls a function that loops two other loops. The first one checks if the Color is below 255 and the Debounce is off, making the brick go from 0,0,0 to 255,255,255 if so. the other one checks if it's above 0 and if the Debounce is on, causing the same effect but inverted if so. The purpose of the Debounce is so that they don't end up acting out of order and glitching the effect. It will loop forever unless the script is deactivated. Since I only used one variable ( Color ), this will only allow the black and white effect you asked, if you need the other values you can create a table, and edit the Color3 like this:

Color = {
0,
0,
0,
}

Brick.Color = Color3.fromRGB(Color[1],Color[2],Color[3])