Room: room{

Event: "Pull lever" {
if (!getPath("down")){
// If no path leading down, show message and set path leading down

screenMessage("A trapdoor opens in the floor!")
hole.setPath("down",hole,false)
// Sets a one-way path from hiddenTunnel to hole
}
else{
screenMessage("Nothing happens.")
// Nothing happens because the trapdoor is already open
}
}
}

Room: hole