onClipEvent (load){
this._x = 10;
}
_x is the horizontal position of the object, counted in ascending pixels from the left edge of the stage. So what we’ve just told Flash is that when the movie loads, it needs to take the current movie clip--referred to as this, thus pointing Flash to the symbol that the ActionScripts are assigned to--and set its horizontal position so that its center point is 10 pixels from the left edge of the stage. It’s like Cartesian coordinates, when graphing on a plane using (x,y). We’ve just set x as 10.
