Hello i need help about movement with AS 2.0

hello … i need help about this code…this code is OK, but i need change to circular motion, the “_root.Line” is a movieclip, and i need move to 180 degrees… and sorry for my english…hehe

on (rollOver) {
_root.Line.onEnterFrame = function() {
_root.Line._x = _root.Line._x+(389-_root.Line._x)/8;
_root.Line._width = _root.Line._width+(68-_root.Line._width)/8;
};
}