You want to create a movieclip with Action Script 3?
ShortTag shows you how:
var mc:MovieClip = new MovieClip();
mc.x = 100;
mc.y = 100;
mc.width = 500;
mc.height = 600;
addChild(mc);
MovieClip mc = new MovieClip(); // we create a MovieClip object
mc.x = 100; mc.y = 100; // we set the x and y coordinates
mc.width = 500; mc.height = 600; // we [...]