Rotation: movie clip wiggle

I’m looking for a way to create a wiggle motion for a movie clip, but I only need the wiggle to occur two times. If you create a line movie clip and give it an instance name of “bar_mc” you can play with this code to see what I’m talking about:


function rotateMC() {
    var posRotateMC = new mx.transitions.Tween(_root.bar_mc, "_rotation", mx.transitions.easing.None.easeNone, 0, 5, 0.1, true);
    posRotateMC.onMotionFinished = function() {
        var negRotateMC = new mx.transitions.Tween(_root.bar_mc, "_rotation", mx.transitions.easing.None.easeNone, 5, -5, 0.1, true);
        negRotateMC.onMotionFinished = function() {
            negRotateMC.continueTo(0, 0.1);
        };
    };
}
timer = setInterval(rotateMC, 1000);
//rotateMC();

It would be nice to script this without the Tween Class since that glitches.