View difference between Paste ID: zt4MtSeC and Xmg0ykz2

 /*
  * robot.js
  *
  * You'll need three keys in order to unlock the
  * Algorithm: the red key, the green key, and the
  * blue key. Unfortunately, all three of them are
  * behind human-proof barriers.
  *
  * The plan is simple: reprogram the maintenance
  * robots to grab the key and bring it through
  * the barrier to us.
  *
  * Let's try it on the red key first.
  */
 
 function getRandomInt(min, max) {
     return Math.floor(Math.random() * (max - min + 1)) + min;
 }
 
 function startLevel(map) {
     // Hint: you can press R or 5 to "rest" and not move the
     // player, while the robot moves around.
 
     map.placePlayer(map.getWidth()-2, map.getHeight()-2);
     var player = map.getPlayer();
 
     map.defineObject('robot', {
         'type': 'dynamic',
         'symbol': 'R',
         'color': 'gray',
         'onCollision': function (player, me) {
             me.giveItemTo(player, 'redKey');
         },
         'behavior': function (me) {
             if (me.canMove('down')) {
                 me.move('down');
             } else if (me.canMove('right')) {
                 me.move('right');
             };
         }
     });
 
     map.defineObject('barrier', {
         'symbol': '░',
         'color': 'purple',
         'impassable': true,
         'passableFor': ['robot']
     });
 
     map.placeObject(0, map.getHeight() - 1, 'exit');
     map.placeObject(1, 1, 'robot');
     map.placeObject(map.getWidth() - 2, 8, 'redKey');
     map.placeObject(map.getWidth() - 2, 9, 'barrier');
 
     for (var x = 0; x < map.getWidth(); x++) {
         map.placeObject(x, 0, 'block');
         if (x != map.getWidth() - 2) {
             map.placeObject(x, 9, 'block');
         }
     }
 
     for (var y = 1; y < 9; y++) {
         map.placeObject(0, y, 'block');
         map.placeObject(map.getWidth() - 1, y, 'block');
     }
 }
 
 function validateLevel(map) {
     map.validateExactlyXManyObjects(1, 'exit');
     map.validateExactlyXManyObjects(1, 'robot');
     map.validateAtMostXObjects(1, 'redKey');
 }
 
 function onExit(map) {
     if (!map.getPlayer().hasItem('redKey')) {
         map.writeStatus("We need to get that key!");
         return false;
     } else {
         return true;
     }
 }