babyObj.prototype.draw = function () {
   // ctx1

   this.x = lerpDistance(mum.x, this.x, 0.98);
   this.y = lerpDistance(mum.y, this.y, 0.98);

   //delta angle
   var deltaY = mum.y - this.y;
   var deltaX = mum.x - this.x;
   var beta = Math.atan2(deltaY,deltaX) + Math.PI;

   this.angle = lerpAngle(beta,this.angle,0.6);

   ctx1.save();

   ctx1.translate(this.x, this.y);
   ctx1.rotate(this.angle);
   ctx1.drawImage(this.babyTail, -this.babyTail.width*0.5+23, -this.babyTail.height*0.5);
   ctx1.drawImage(this.babyBody, -this.babyBody.width*0.5, -this.babyBody.height*0.5);
   ctx1.drawImage(this.babyEye, -this.babyEye.width*0.5, -this.babyEye.height*0.5);

   ctx1.restore();
}