Why doesn't my texture-changing script work ?

Hello,there !

I'm trying to make a script where you click onto a button on a ScreenGui and then your mesh's texture changes by the selected color, but it doesn't work...

Here's my attempt:

Car = script.Parent Red = game.StarterGui.ChevPaint.ImageLabel.ScrollingFrame.Red.TextButton

Red.MouseButton1Click:connect(function() Car.TextureID = '1005158804'

end)

I'm not sure if I did it correct,I didn't get any red or blue lines underneath the codes. Could any of you find the problem because I'm not sure of it... Do I write full address of the ID like 'http://www.roblox.com/develop/decals/[Code Here]/Red' or just '[Code Here]'