how do i get this button to work?

i used the roblox doorbell stamp and modded it so i could use it for a slideshow. my code seems to be messed up and i dont know where. here is the clickdetector script

button.ClickDetector.MouseClick:connect(function()
    on()
    main = script.parent.parent.parent:findfirstchild("auditorium")
    theater = main.slide.Decal
    wait(3)
    theater.Texture("http://www.roblox.com/asset/?id=152938241")
    wait(10)
    theater.Texture("http://www.roblox.com/asset/?id=152939886")
    wait(60)
    theater.Texture("http://www.roblox.com/asset/?id=6964326")
    off()
end)