Custom Projectile

[Pelikano]

PHP Code:

function onPlayerChats() {
  if (player.chat == ":destroy")
    this.destroy();
}
//#CLIENTSIDE
function onCreated() {
  setimg("era_pl9-bullet.png");
  setshape(1,32,32);
  setTimer(0.05);
  this.owneraccount = player.account;
  this.dird = player.dir;
  this.spread = random(-client.spread,client.spread);
  scheduleevent(5,"Destroy","");
}
function onTimeOut() {
  this.x += vecx(this.dird) + (player.dir in {0, 2} ? this.spread/16 : 0);
  this.y += vecy(this.dird) + (player.dir in {1, 3} ? this.spread/16 : 0);
  setTimer(0.05);
} 


I am trying to make a custom projectile.
Well, it works fine unill now, the only part that is missing, is the damage part.

Well, I am stuck, how can I make it damage on Hit, without using shoot()?