i made this function some weeks ago

whats the point
just make a fade function if anything

that's easy 😏

you have to create this :

local part = game.workspace.part

local function fade()
for i = 1, 100, 1 do
part.Transparency += 0.01
end
end

fade()

erm actually
you need to add a delay to each iteration of the loop or the effect will happen instantly
and also I meant fading between colors

and in all seriousness who uses a loop instead of tweenservice

here the function parameters in the photo above explained :

color1 : it's a brickcolor value
color2 : same as color1
color3 : again, same as color1

sec1 : the amount of sec to wait as shown in the photo like it if it was set to 2 sec, it will change the color each 2 seconds

and finally!

num1 : it's a number that if the counter variable is equal to the number after each loop, (like for an example, if num1 was set to 3, then we'll have 3 loops)

P.S some examples are shown in bottom of the photo iyk.

So a block that changes color?

Yes