for loop + position mc's

After attaching movie clips to my stage, I am attempting to reposition each 
clips _x coordinates using a combination for(loop) and onEnterFrame. 

 Because I need to reference each movie clip by name, I use a for(loop) to 
created generate MC names and then store it in a variable called "cp".  I 
attempt to reference the  ._x properties using the variable "cp" but it doesn't 
seem to work.  Any suggestions??

 Here is my code:

 // future arrays
 var nodes:Number = 3

 // position movie clips
 for (i:Number = 0; i < nodes; i++) {
 cp = "box"+i
 this.onEnterFrame = function():Void {
 cp._x += (0 - cp._x)/i+1;
 }; //end onE
 }; //end for loop

Here is the entire block of code from which this potion was taken:

 // future array
 var nodes:Number = 3

 //attach movie clips to stage
 for (i:Number = 0; i < nodes; i++) {
 var d:Number = this.getNextHighestDepth();
 var mc:MovieClip = attachMovie("box", "box"+d, d, {_x: Stage.width, _y: i*83});
 }; //end for loop

 // position movie clips
 for (i:Number = 0; i < nodes; i++) {
 cp = "box"+i
 trace(cp)
 this.onEnterFrame = function():Void {
 cp._x += (0 - cp._x)/i+1;
 }; //end onE
 }; //end for loop

first of all, this will not work because a movie clip is not a string.
 To reference a movieclip with a dynamically generated name you need to use 
eval or the [] operators. So cp="box"+i should be cp=this["box" + i].

 Second, even if that is corrected the animation will not work because a 
variable can hold only one value at a time. It cannot hols all movieclips only 
the last one. 
 And you are using a single onEnterFrame assignmed meny times to the same clip 
(the root timeline) which does not have any sense either.

 You need to reference each clip, add an onEnterFrame to each clip and use this 
to reference each one.

 The right way to doit is:

 // position movie clips
 for (i:Number = 0; i < nodes; i++) {
 cp = this["box"+i];
 cp.onEnterFrame = function():Void {
 this._x += (0 - this._x)/i+1;
 }; //end onE
 }; //end for loop

Thank you.  There is much I need to learn. Little by little I hope to be taller one day! Thanks again.

I guess I don't really understand how for loops work.

 Juankpro addressed my original question with this snip of code:
 // position movie clips
 for (i:Number = 0; i < nodes; i++) {
 cp = this["box"+i];
 cp.onEnterFrame = function():Void {
 this._x += (0 - this._x)/i+1;
 }; //end onE
 }; //end for loop

 I thought by making some modifications I could:
 1) position each clip to a different spot ( i*83) and 2) have each clip move 
at a differnt speed ( / i)
 this._x += (i*83 - this._x) / i +1;

 I imagined that the first time the for loop ran throught it the destination _x 
= 0 ( 0*83) at a rate /1 (0+1) and the second time it ran, the destination _x = 
83 at a rate of  /2 (1+1), and so on...

 But instead it all of the clips move to the last number of the for loop so the 
destination _x = 4*83 and the rate /5.  How can I target each instance to have 
a unique destination and speed?

 Can anyone follow my train of thought here??

// position movie clips
 for (i:Number = 0; i < nodes; i++) {
 cp = this["box"+i];
 cp._x = 0;
 cp.endX = (i * 83);
 cp.speed = i + 1;
 cp.onEnterFrame = function():Void {
 this._x += (this.endX - this._x)/this.speed;
 }; //end onE
 }; //end for loop

When creating this kind of loops you cannot use the original loop variables 
because they will always have the last loop value.

 So the thecnique implies saving a copy of the loop variables into a clip own 
variables and then use this new properties on the onEnterFrame event.