# Need Code Explanation

Hello friends…
Bale here…
I am a new member to this Group…
I need the explanation for the following code which is taken from our site

http://www.kirupa.com/developer/mx/random_motionMX.htm

anyway i ll paste the code too here…

Waiting for someone’s response…
thank you…
YOurs friendly
Bala…

function getdistance(x, y, x1, y1) {
var run, rise;
run = x1-x;
rise = y1-y;
return (_root.hyp(run, rise));
}
function hyp(a, b) {
return (Math.sqrt(aa+bb));
}
MovieClip.prototype.reset = function() {
//specify the width and height of the movie
width = 300;
height = 200;
//-------------------
var dist, norm;
this.x = this._x;
this.y = this._y;
this.speed = Math.random()*4+2;
this.targx = Math.random()*width;
this.targy = Math.random()*height;
dist = _root.getdistance(this.x, this.y, this.targx, this.targy);
norm = this.speed/dist;
this.diffx = (this.targx-this.x)*norm;
this.diffy = (this.targy-this.y)*norm;
};
MovieClip.prototype.move = function() {
if (_root.getdistance(this.x, this.y, this.targx, this.targy)>this.speed) {
this.x += this.diffx;
this.y += this.diffy;
} else {
this.x = this.targx;
this.y = this.targy;
if (!this.t) {
this.t = getTimer();
}
if (getTimer()-this.t>1000) {
this.reset();
this.t = 0;
}
}
this._x = this.x;
this._y = this.y;
};