Surface GUI on mousebutton1down?

I'm looking for help on, if I were to click a button, the BackgroundColor3 would change to the color put in the script. Say, the original background color is (0, 0, 0), If I wanted it to change to (255, 0, 0) and then (255, 255, 255), what would be a script to do this? Please remember I'm just starting on Surface GUI's.

Heres some help

In a server-script

local SG = script.Parent -- make sure the script is inside the surface gui
local Frame = SG.Frame -- get the frame
local Button = Frame.Button -- get the button which is inside frame
local Brick = SG.Parent -- make sure the SurfaceGui is inside the brick/part

function RGB(r,g,b) -- red, green, blue
	return Color3.new(r/255,g/255,b/255) -- return the colors
end

Button.MouseButton1Click:connect(function(Clicked!) -- using an anonymous function
	if Button.BackgroundColor3 == RGB(255,0,0) then -- check if BackgroundColor3 equals 255,0,0
		Button.BackgroundColor3 = RGB(255,255,255) -- change color
	elseif Button.BackgroundColor3 == RGB(255,255,255) then
		Button.BackgroundColor3 = RGB(255,0,0)
	end
end)

if this helped please upvote my answer

also remember that screengui's act like regular guis just a bit different