// Your robot must be in the variable "Robot"
var Robot = function(robot) { };
Robot.prototype.onIdle = function(ev) {
var robot = ev.robot;
robot.ahead(100);
robot.rotateCannon(360);
robot.back(100);
robot.rotateCannon(360);
};
Robot.prototype.onScannedRobot = function(ev) {
var robot = ev.robot;
robot.fire();
};