if (on == 1)
{
    image_index = 1;
    if (control_check_pressed(0))
    {
        if (con == 0)
        {
            con = 1;
            with (obj_sansb_body)
                death_c = 1;
            with (obj_heart)
                movement = -1;
        }
    }
}
else
{
    image_index = 0;
}
on = 0;