if (global.turntimer > 8)
{
    xset = floor(random(3));
    if (xset == xsetmem)
        xset += 1;
    if (xset == 3)
        xset = 0;
    xsetmem = xset;
    g = instance_create(obj_lborder.x + (xset * 23), obj_dborder.y, obj_risespearbullet);
    g.type = offchoice;
    alarm[0] = global.firingrate;
}