if (off == 0)
{
    gravity = 0.1;
    gravity_direction = 0;
}
if (off == 1)
{
    gravity = 0.1;
    gravity_direction = 180;
}
if (off == 2)
{
    gravity = 0.1;
    gravity_direction = 60 + random(60);
    pop = scr_monstersum();
    if (pop > 1)
        instance_destroy();
}