// Rain Alley: an after() timer keeps the pipe dripping — on the game's
// deterministic 30Hz clock, never the CPU's.

fn on_enter() {
    if val("drip_armed") == 0 {
        set_val("drip_armed", 1);
        after(240, "drip");
    }
}

fn drip() {
    if room() == 2 {
        say("The pipe drips, once, with great ceremony.");
        after(300, "drip");
    } else {
        set_val("drip_armed", 0);
    }
}