if (!instance_exists(id_bull))
{
    instance_destroy()
    return;
}
image_xscale += image_xscale_inc
image_yscale += image_yscale_inc
imagea_normal -= 0.05
if (imagea_normal <= 0)
{
    instance_destroy()
    return;
}
image_alpha = imagea_normal * id_bull.image_alpha
depth = depth_default - image_xscale