Script not changing surface guis colors?

The script is suppost to change a surface gui color well many of them... But it doesn't work when I play Could anyone fix this??

local function check(color1, color2)
	Pad("A1", color1)
	Pad("A2", color2)
	Pad("A3", color1)
	Pad("A4", color2)
	Pad("A5", color1)
	Pad("A6", color2)
	Pad("A7", color1)
	Pad("A8", color2)
	Pad("A9", color1)
	Pad("A10", color2)
	--B
	Pad("B1", color2)
	Pad("B2", color1)
	Pad("B3", color2)
	Pad("B4", color1)
	Pad("B5", color2)
	Pad("B6", color1)
	Pad("B7", color2)
	Pad("B8", color1)
	Pad("B9", color2)
	Pad("B10", color1)
	-- C
	Pad("C1", color1)
	Pad("C2", color2)
	Pad("C3", color1)
	Pad("C4", color2)
	Pad("C5", color1)
	Pad("C6", color2)
	Pad("C7", color1)
	Pad("C8", color2)
	Pad("C9", color1)
	Pad("C10", color2)
	--D
	Pad("D1", color2)
	Pad("D2", color1)
	Pad("D3", color2)
	Pad("D4", color1)
	Pad("D5", color2)
	Pad("D6", color1)
	Pad("D7", color2)
	Pad("D8", color1)
	Pad("D9", color2)
	Pad("D10",color1)
	--E
	Pad("E1", color1)
	Pad("E2", color2)
	Pad("E3", color1)
	Pad("E4", color2)
	Pad("E5", color1)
	Pad("E6", color2)
	Pad("E7", color1)
	Pad("E8", color2)
	Pad("E9", color1)
	Pad("E10",color2)
	--F
	Pad("F1", color2)
	Pad("F2", color1)
	Pad("F3", color2)
	Pad("F4", color1)
	Pad("F5", color2)
	Pad("F6", color1)
	Pad("F7", color2)
	Pad("F8", color1)
	Pad("F9", color2)
	Pad("F10",color1)
	--G
	Pad("G1", color1)
	Pad("G2", color2)
	Pad("G3", color1)
	Pad("G4", color2)
	Pad("G5", color1)
	Pad("G6", color2)
	Pad("G7", color1)
	Pad("G8", color2)
	Pad("G9", color1)
	Pad("G10", color2)
	--H
	Pad("H1", color2)
	Pad("H2", color1)
	Pad("H3", color2)
	Pad("H4", color1)
	Pad("H5", color2)
	Pad("H6", color1)
	Pad("H7", color2)
	Pad("H8", color1)
	Pad("H9", color2)
	Pad("H10",color1)
	--I
	Pad("I1", color1)
	Pad("I2", color2)
	Pad("I3", color1)
	Pad("I4", color2)
	Pad("I5", color1)
	Pad("I6", color2)
	Pad("I7", color1)
	Pad("I8", color2)
	Pad("I9", color1)
	Pad("I10", color2)
	--J
	Pad("J1", color2)
	Pad("J2", color1)
	Pad("J3", color2)
	Pad("J4", color1)
	Pad("J5", color2)
	Pad("J6", color1)
	Pad("J7", color2)
	Pad("J8", color1)
	Pad("J9", color2)
	Pad("J10",color1)
end





local col1 = Color3.fromRGB(math.random(), math.random(), math.random())
local col2 = Color3.fromRGB(math.random(), math.random(), math.random())
for i=1, 10 do
	wait(0.1)
	check(col1, col2)
	wait(0.1)
	check(col2, col1)
end
return col1, col2