x += (sin(siner / 4) / 2);
y += (cos(siner / 4) / 2);
siner += 1;
if (instance_exists(obj_flyjar))
{
    image_alpha = obj_flyjar.image_alpha;
    if (x > obj_flyjar.bbox_right)
    {
        x -= 4;
        if (hspeed > 0)
            hspeed = -hspeed;
    }
    if (x < obj_flyjar.bbox_left)
    {
        x += 4;
        if (hspeed < 0)
            hspeed = -hspeed;
    }
    if (y < obj_flyjar.bbox_top)
    {
        y += 4;
        if (vspeed < 0)
            vspeed = -vspeed;
    }
    if (y > obj_flyjar.bbox_bottom)
    {
        y -= 4;
        if (vspeed > 0)
            vspeed = -vspeed;
    }
}
else
{
    instance_destroy();
}