Make an object move to right side automatically

It is so basic tutorial, but I think it very usefull.

Lets begin.
This is the steps for make an object move to the right when movie clip running :

1.open macromedia flash if you have one, if you don’t have one, go to http://www.macromedia.com to download macromedia flash
2.make a ball with oval tool
3.select the ball then press f8 to convert it into movie clip
4.choose movie clip in the dialog box and give it name, ex : ball













5.right click at the ball. Choose panel then choose instance name, ex : ball_mc
6.in frame, right click then choose action
7.choose expert mode
8.type this action script :
ball_mc.onEnterFrame = function() {this._x += 10;};
9.test your movie clip by click “control” in menu bar- then choose “test movie”