Angular Acceleration

package;

import flixel.FlxG;
import flixel.FlxSprite;
import flixel.FlxState;

class PlayState extends FlxState
{
    var sprite:FlxSprite;

    override public function create()
    {
        super.create();

        sprite = new FlxSprite("assets/arrow.png");
        sprite.screenCenter();
        add(sprite);

        sprite.angularAcceleration = 30;
    }

    override public function update(elapsed:Float)
    {
        if (Math.abs(sprite.angularVelocity) >= 600)
            sprite.angularAcceleration *= -1;

        super.update(elapsed);
    }
}