haloObj.prototype.born = function (x, y) {

    for (var i = 0; i < this.num; i++) {

        if (!this.alive[i]) {

            //console.log("born");

            this.alive[i] = true;

            this.r[i] = 10;

            this.x[i] = x;

            this.y[i] = y; 

            return;

        }

    }

}