I'm trying to get this script to put a decal on a screen but can't seem to get it to work

button = script.Parent.Enter

DecalId = script.Parent.DecalId
screen1 = game.Workspace().Decal.Texture
screen2 = game.Workspace().Decal.Texture

function onclicked()
	screen1 = "http://www.roblox.com/asset/?id="..mygui.Frame.idInput.Text - 1
	screen2 = "http://www.roblox.com/asset/?id="..mygui.Frame.idInput.Text - 1
end

script.Parent.idInput.MouseButton1Down:connect(onclicked)
Anonymous