conditional expression question...

// Declare the 'spotlight var'
var myvar:Number = 10;
// Declare a variable to hold reference before equations
var myvarref:Number;
// Stack for testing purposes
var mystack:Number = 5;
// Declare the loop iterator beforehand
var i:Number = 0;

for(; i<10; i++){
    // Save the reference
    myvarref = myvar;

    // Modify myvar randomly
    myvar += Math.round(Math.random()) === 1 ? 1 : -1;

    // Test conditional, do somthing involving the variable
    if(myvar > myvarref){
        mystack += myvar;
    }else{
        mystack += myvarref;
    }
}
trace(mystack);

// Note: For AS1, remove ':Number' from the variables

//some vars to work with here...
var hSW = .5*Stage.width;
var hSH = .5*Stage.width;
var xM = .xmouse;
var yM = .ymouse;
var aVG = ((Math.abs(hSW - xM)) +(Math.abs(hsH - yM))/2;
//in theory...of course my paths might be all wrong...please check,
//the aVG var gives me a larger number as I get farther away from the
//center of the stage with my mouse...I want to monitor this number and
//cause MCs to move to the left or right depending on if aVG is getting
//bigger or smaller...my guess is that there is more than one way to
//make this work...I am probably doing it the hard way...

//I was thinking of a function that would be on each MC's timeline...and
//this is where the original proposition came into play...
_root.onEnterFrame = function() {
  if (aVG gets bigger) {
    this._x = this._x + (aVG/10); //moves the MC right, across the stage
  }else{
    this._x = this._x - (aVG/10); //moves the MC left, across the stage
  }
};
//I want the effect to take place the whole time the view has this movie
//loaded in the window...so about 4 MCs are always moving right or left
//when the mouse is moving...