tttt

function enterFrameHandler(event:Event):void
{
    var now:int = getTimer();
    var time:Number = (now - startTime) / 1000;
    currentBar = time / secondsPerBar;
    var barTime:Number = time % secondsPerBar;
    var beat:int = barTime / beatTime;
    measure_tf.text = "Bar  : " + currentBar + "\nBeat : " + beat;
    var n:int = arrows.length;
    for (var i:int = n - 1; i > -1; i--)
    {
        var arrow:MovieClip = arrows[i];
        if (frameKeys[arrow.currentFrame] && arrow.hitTestObject(targetLine))
        {
            removeChild(arrow);
            arrows.splice(i, 1);
            continue;
        }
        arrow.y = (time - arrow.time) / speed * 500;
        if (arrow.y >= 600)
        {
            removeChild(arrow);
            arrows.splice(i, 1);
        }
    }
    frameKeys.length = 0;
    currentBeat = beat;
    var position:int = currentBar * 8 + currentBeat;
    if (position >= data.length)
        return;
    var bits:int = data[position];
    if (!bits)
        return;
    for (var shift:int = 0; shift < 4; shift++)
    {
        if (!(bits & 1 << shift))
            continue;
        arrow = new Arrow();
        arrow.time = position * beatTime;
        arrow.gotoAndStop(shift + 1);
        arrow.x = 225 + (arrow.currentFrame - 1) * 50;
        arrow.y = (time - arrow.time) / speed * 500;
        addChild(arrow);
        arrows.push(arrow);
    }
}