if (!instance_exists(obj_heart_battle_fighting_parent))
{
    instance_destroy()
    return;
}
x = obj_heart_battle_fighting_parent.x
y = obj_heart_battle_fighting_parent.y
image_xscale += 0.1
image_yscale += 0.1
image_alpha -= 0.05
if (image_alpha <= 0)
    instance_destroy()