Help With Color Changing Blocks?

Okay so, very new so whatever, don't know how to do much so I'm just going to start with asking this - instead of making a block shift colors completely randomly, I want it to specific colors - although I can't find a way or any codes on how to do so. And I mean I don't just want the basic colors either, that's the problem.

I tried the palette coding somewhat:

script.Parent.Brickcolor = Brickcolor.palette(val)

Although, I couldn't find anything that told me what values I needed for those said colors, so it just ended with a bunch of guess work.

To solve that myself I was going to wright that code I listed above, start it at value 1, loop it and add 1 onto that value several times and make it print the name of the brickcolor each time, then end once it reached a certain value. BUT, not sure how to do that either. The print function only printed things like "table: 31483234", and I wasn't exactly sure how to add 1 to the value either.

If your wanting plain colors:

-- Put this script into the brick.
while true do
	script.Parent.BrickColor = BrickColor.Random()
	wait(1) -- Set the "1" to the amount of seconds you want to be between each color change.
end

But if your wanting more realistic colors, You would use this:

-- First number: Amount of Red
-- Second Number: Amount of Green
-- Third Number: Amount of Blue

while true do
	script.Parent.Color = Color3.fromRGB(255, 255, 255) 
	wait(1)
end