DumberZero

robot.js

// helpers

function areEnemies(robot, sighted) {
  var sightedIsChild  = (robot.id == sighted.parentId);
  var sightedIsParent = (robot.parentId == sighted.id);

  return !(sightedIsChild || sightedIsParent);
};

function baseStep(robot) {
  return 6 * direction(robot);
};

function charge(robot) {
  robot.ahead(360);
};

function direction(robot) {
  return isParent(robot) ? 1 : -1;
};

function fallback(robot) {
  robot.ignore('onHitByBullet');
  robot.back(30 * baseStep(robot));
  robot.listen('onHitByBullet');
};   

function isParent(robot) {
  return robot.parentId ? true : false;
};

function seekAndDestroy(robot) {
  var step = baseStep(robot);

  robot.rotateCannon(step);
  robot.turn(step);
  robot.ahead(step);
};

// robot

var Robot = function(robot) {
  robot.clone();
};

Robot.prototype.onIdle = function(ev) {
   seekAndDestroy(ev.robot);
};

Robot.prototype.onScannedRobot = function(ev) {
   var robot   = ev.robot;
   var scanned = ev.scannedRobot;

  if (areEnemies(robot, scanned)) {
    var adjustment = -(36 * direction(robot));

    robot.fire(); robot.fire();
    robot.rotateCannon(adjustment);
  }
};