Need help adding loop to this script

1

Can someone tell me how to add loop?
I tried with ‘for’ but stopDrag didnt work after that.

button.onPress=function(){
 drop();
 
}
function drop(){
 duplicateMovieClip(pie, "pie1", 1);
 duplicateMovieClip(pie, "pie2", 2);
 duplicateMovieClip(pie, "pie3", 3);
 duplicateMovieClip(pie, "pie4", 4);
 
 startDrag(pie1, true);
onMouseDown=function(){
if(pie1.hitTest(acont1)){
pie1.stopDrag(true);
startDrag(pie2, true);
if(pie2.hitTest(acont1)){
pie2.stopDrag(true);
startDrag(pie3, true);
if(pie3.hitTest(acont1)){
pie3.stopDrag(true);
startDrag(pie4, true);
if(pie4.hitTest(acont1)){
pie4.stopDrag(true);
}
}
 
}
}
}
}