function scr_rhythmgame_draw_backing(arg0, arg1, arg2 = false, arg3 = 0)
{
    if (arg2)
        fade = 0;
    if (fade == 1 && brightness == 1)
        draw_set_color(c_gray);
    else
        draw_set_color(merge_color(c_black, c_gray, fade * brightness));
    var _gray = merge_color(c_black, c_gray, brightness);
    draw_set_color(c_black);
    var _flash = 0;
    var _ts = signature;
    var _bpm = bpm;
    var _posoffset = startoffset;
    var _rts = max(4, floor(signature));
    draw_set_color(c_red);
    if (arg2)
    {
        var _sigmul = _ts % 1;
        if (_sigmul == 0)
            _sigmul = 1;
        draw_text(10, 80, "Time Signature: " + string(_ts / _sigmul) + "/" + string(4 / _sigmul));
        draw_text(10, 100, "BPM: " + string(_bpm));
    }
    draw_set_color(c_black);
    var _bpm_mul = 1;
    if (bpm_count > 1)
        _bpm_mul = _bpm / bpm_change[0];
    if (invc > 0 && fade == 1)
        _flash = remap_clamped(0, 6, 0, 1, hurt_flash);
    draw_set_alpha(0.75);
    ossafe_fill_rectangle(arg1 - 40, bottomy - 200, arg1 + 40, bottomy + 50, false);
    draw_set_alpha(1);
    draw_set_blend_mode(bm_normal);
    var _lead = floor_to_multiple(16, _ts);
    var _lead_num = _lead / _ts;
    var whitebar = -1;
    var _bpmi = bpm_index;
    var _notespacing = notespacing;
    if (signature_index != 0 && bpm_index != 0)
        _posoffset = max(bpm_time[_bpmi], signature_time[signature_index]);
    else if (signature_index != 0)
        _posoffset = signature_time[signature_index];
    else if (bpm_index != 0)
        _posoffset = bpm_time[_bpmi];
    var linegap = arg0 * _notespacing;
    var linestart = bottomy + (((trackpos - _posoffset) % (_notespacing * _ts)) * arg0);
    draw_set_color(_gray);
    var liney = linestart;
    draw_set_color(_gray);
    var _bpm_changed = true;
    var _next_bpm = _bpm;
    var _next_bpm_time = -1;
    if (bpm_count > 1 && _bpmi < (bpm_count - 1))
    {
        _next_bpm = bpm_change[_bpmi + 1];
        _next_bpm_time = bpm_time[_bpmi + 1];
        _bpm_changed = false;
    }
    var nextBar = floor(trackpos / meter);
    var _ts_changed = true;
    var _next_ts = _ts;
    var _next_ts_time = -1;
    if (signature_count > 1 && signature_index < (signature_count - 1))
    {
        _next_ts = signature_change[signature_index + 1];
        _next_ts_time = signature_time[signature_index + 1];
        _ts_changed = false;
    }
    var _barcount = 0;
    var _pregap = linegap;
    if (bpm_index > 0 && ((trackpos + ((bottomy - liney) / arg0)) - 0.5) < bpm_time[bpm_index])
        _pregap = (60 / bpm_change[bpm_index - 1]) * arg0;
    draw_set_color(c_gray);
    if (signature_index > 0)
    {
        var _last_ts = _ts;
        if ((trackpos - 0.5) < signature_time[signature_index])
            _last_ts = signature_change[signature_index - 1];
        if ((_last_ts % 1) != 0)
            liney -= (linegap / 2);
    }
    for (var i = 0; i < _rts; i++)
    {
        liney += _pregap;
        if (!arg2 && (liney + 1) > (bottomy + 50))
            break;
        d_line(arg1 - 40, liney, arg1 + 40, liney);
    }
    liney = linestart;
    var _eighths = (_ts % 1) == 0.5;
    var _oddts = false;
    if (_eighths)
    {
        if (((trackpos - signature_time[signature_index]) % (_ts * 2)) >= _ts)
            _oddts = true;
    }
    for (var i = 0; i < max(20, _rts * 2); i++)
    {
        if (i > 0)
            liney -= linegap;
        if (!arg2 && (liney - 1) < (bottomy - 202))
        {
            if (!(_eighths && _barcount <= 0 && ((liney - 1) + (linegap / 2)) > (bottomy - 202)))
                break;
        }
        else if (!arg2 && (liney + 1) > (bottomy + 50))
        {
            if (_barcount <= 0)
                _barcount = _ts - 1;
            else
                _barcount--;
            continue;
        }
        if (_barcount <= 0)
        {
            if (_eighths)
            {
                if (i != 0)
                    liney += (linegap / 2);
            }
            ossafe_fill_rectangle(arg1 - 40, liney - 1, arg1 + 40, liney + 1, false);
            var linetime = trackpos + ((bottomy - liney) / arg0);
            if (arg2)
            {
                draw_text(arg1 - 60, liney - 1 - 8, nextBar + (i / _ts) + 1);
                draw_text(arg1 + 60, liney - 1 - 8, linetime);
            }
            if (!_ts_changed && (linetime + 0.5) > _next_ts_time)
            {
                _ts = _next_ts;
                _ts_changed = true;
            }
            if (!_bpm_changed && (linetime + 0.5) > _next_bpm_time)
            {
                if (arg2)
                {
                    draw_sprite_ext(spr_arrow_9x9, 0, arg1 + 100, (liney - 1 - 1) + 2, 1, (_next_bpm > _bpm) ? -1 : 1, 0, c_white, 1);
                    draw_text(arg1 + 110, liney - 1 - 8, string(_next_bpm) + " BPM");
                }
                _bpm_changed = true;
                _bpm = _next_bpm;
                linegap = (60 / _bpm) * arg0;
            }
            _barcount = _ts - 1;
        }
        else
        {
            _barcount--;
            d_line(arg1 - 40, liney, arg1 + 40, liney);
        }
    }
    if (_flash > 0)
    {
        draw_set_blend_mode(bm_add);
        var _flashCol = merge_color(c_black, c_red, _flash * fade * brightness);
        ossafe_fill_rectangle_color(arg1 - 40, bottomy - 200, arg1 + 40, bottomy + 50, c_black, c_black, _flashCol, _flashCol, false);
        draw_set_blend_mode(bm_normal);
    }
    draw_set_color(c_white);
}