function scr_beatbullet()
{
    var _frames = argument[1];
    var _targetBeat = argument[2];
    var _yTop = cameray();
    var _yBottom = _yTop + 450;
    if (argument_count > 5)
        _yTop = argument[5];
    if (argument_count > 6)
        _yBottom = argument[6];
    with (instance_create_depth(argument[0], _yTop, 0, obj_beatbullet))
    {
        endY = _yBottom;
        targetX = argument[0];
        follow = argument[4];
        bpm = argument[3];
        framesAway = 999;
        frames = _frames;
        image_alpha = 0;
        bps = bpm / 60;
        spb = 1 / bps;
        bpf = bps / game_get_speed(gamespeed_fps);
        if (snd_is_playing(global.currentsong[1]))
        {
            soundTimeStep = audio_sound_get_track_position(global.currentsong[1]);
            beats = soundTimeStep / spb;
            beatsPrev = beats;
            targetBeat = floor(beats + _targetBeat);
            inSync = true;
        }
        else
        {
            targetBeat = _targetBeat;
            inSync = false;
        }
    }
}