Grunt

robot.js

//FightCode can only understand your robot
//if its class is called Robot
var Robot = function(robot) {
    this.rotate = 1;
    this.dist = 0;
    this.lastAngle = 0;
};

Robot.prototype.onIdle = function(ev) {
  var robot = ev.robot;
  robot.turn(this.rotate);
  this.lastAngle = this.rotate;
};

Robot.prototype.onScannedRobot = function(ev) {
  var robot = ev.robot;
  var turnAngle = this.getAngle(robot.position, ev.scannedRobot.position);
  
  if (turnAngle < -180){
    turnAngle += 360;
  }else if(turnAngle > 180){
    turnAngle -= 360;
  }
  
  this.rotate = robot.cannonAbsoluteAngle - turnAngle
  this.dist = this.getDist(robot.position, ev.scannedRobot.position);
  robot.fire();
  robot.ahead(this.dist/2);
};

Robot.prototype.onHitByBullet = function(ev) {
    var robot = ev.robot;
    this.rotate = ev.bearing;
    robot.turn(ev.bearing/2);
    robot.ahead(15);
};

Robot.prototype.getAngle = function(a,b){
    var tx = b.x - a.x,
			  ty = b.y - a.y,
			  rad = Math.atan2(ty,tx),
			  angle = (rad/Math.PI * 180);
		return angle;
}

Robot.prototype.getDist = function(a,b){
  return Math.sqrt((b.x - a.x) *(b.x - a.x) + (b.y - a.y) * (b.y - a.y));
}