/*
 * The round switches won't stay on unless something is placed on top of them.
 */

r = this;

all_off = function() {
  r.thrusters.top(false);
  r.thrusters.bottom(false);
  r.thrusters.left(false);
  r.thrusters.right(false);
}

var step = 0, call = 0;

sw = function(sensor, on, check, cb) {
  var this_step = call;
  call = call + 1;
  r.on("sensor:" + sensor, function(c) {
    if (c == check && step == this_step) {
        step = step + 1;
        all_off()
        r.thrusters[on](true);
        if (cb) cb();
    }
  });
}

r.on("start", function() {r.thrusters.bottom(true); });

sw("top", "left", true);
sw("right", "top", true);
sw("left", "left", true);
sw("right", "top", true);
sw("bottom", "left", true);
sw("right", "bottom", true);
sw("left", "left", true);