Never mind! got it!

PHP Code:
import mx.transitions.Tween;
import mx.transitions.easing.*;
var 
yScaleT:Tween = new Tween(myBox"_x"Strong.easeInOut, -40402true);
yScaleT.onMotionFinished = function() {
    
trace("finished start");
    
callNextTween();
};
function 
callNextTween() {
    var 
rndNum random(2);
    switch (
rndNum) {
    case 
:
        var 
yScaleP:Tween = new Tween(myBox"_rotation"Strong.easeInOut, -40401true);
        
trace("zero");
        
//einde();
        
break;
    case 
:
        var 
yScaleP:Tween = new Tween(myBox"_rotation"Strong.easeInOut, -20201true);
        
trace("one");
        
//einde();
        
        
break;
        
    }
    
yScaleP.onMotionFinished = function() {
    
trace("finished start2");
    
callNextTween();
};