Background Color Changing script doesnt work?

I made a script that should change the background color of my main menu but it doesnt work.

Does anyone know why, and how to fix it?

It's supposed to loop forever but it only changes it to red and then yellow and it stops.

local A = 250
local B = 0
local C = 0

while 1 + 1 == true do
	repeat
		script.Parent.BackgroundColor3 = (Color3.new(A, B, C))
		B = B + 25
			wait(0.2)
	until B == 250

	repeat
		script.Parent.BackgroundColor3 = (Color3.new(A, B, C))
		A = A - 25
			wait(0.2)
	until A == 0
	
	repeat
		script.Parent.BackgroundColor3 = (Color3.new(A, B, C))
		C = C + 25
			wait(0.2)
	until C == 250
	
	repeat
		script.Parent.BackgroundColor3 = (Color3.new(A, B, C))
		B = B - 25
			wait(0.2)
	until B == 0
	
	repeat
		script.Parent.BackgroundColor3 = (Color3.new(A, B, C))
		A = A + 25
			wait(0.2)
	until A == 250
end

Thank you for your time.

To address your problem, 1+1 does not equal true, it equals 2. There's no reason to have any other statement between your while loop unless it's a function that yields, or just putting the true (boolean statement) directly in the condition for the while loop.

Here would be your alternative:

while true do
	-- ... ect
	-- Just make sure you have something that yields your thread, since we're making it an infinite loop.
end

Or if you insist on using the condition you provided, here's how you'd write it:

while 1+1 do
	-- ect
end

Or...

while 1+1==2 do
	-- ect
end

Or...

while 1+1~=1 do
	-- ect
end

This literally goes on forever. I'd just stick with using "true" as your while condition, as long as you throw a wait() somewhere in there.

EDIT:

And as Pyrondon has stated, Color3 values only range from 0-1 (0 being black, and 1 being white). Which means you'd have to divide your numbers by 255, to get the decimal result.

Color3 values must be divided by 255 to work, as they have to be in between 0 and 1.

local A = 250
local B = 0
local C = 0

while 1 + 1 == true do
    repeat
        script.Parent.BackgroundColor3 = (Color3.new(A/255, B/255, C/255))
        B = B + 25
            wait(0.2)
    until B == 250

    repeat
        script.Parent.BackgroundColor3 = (Color3.new(A/255, B/255, C/255))
        A = A - 25
            wait(0.2)
    until A == 0

    repeat
        script.Parent.BackgroundColor3 = (Color3.new(A/255, B/255, C/255))
        C = C + 25
            wait(0.2)
    until C == 250

    repeat
        script.Parent.BackgroundColor3 = (Color3.new(A/255, B/255, C/255))
        B = B - 25
            wait(0.2)
    until B == 0

    repeat
        script.Parent.BackgroundColor3 = (Color3.new(A/255, B/255, C/255))
        A = A + 25
            wait(0.2)
    until A == 250
end

Hope this helped.