Basic script doesn't work in Play mode?

Whenever I go to Play Solo mode, the script works, but when I click Play, it doesn't work. Why?

H = game.Workspace.Door

function onTouch(Door)
H.Transparency = 0.5
H.CanCollide = false
wait(5)
H.Transparency = 0
H.CanCollide = true
end

script.Parent.Touched:connect(onTouch)

Hmm....try adding

wait()

at the top. I've heard that with certain scripts, you need the wait function for some reason.

Don't do play solo only do Play, Scripts don't work in play solo