Ants movement (based on snow movement)

Hey! I have a question for those who think they can help and might have the time to do so. I wish to get the effect of ants scuttering across the screen or up a tree, I have not decided which direction yet. I started with the tutorial code for the snow effect from kirupa, and changed it around to fit the little vector ant I created. The way I have it now looks pretty good, but the movement is a little too fluid. They obviously move in sinusoidal paths bc the code tells them to. I have about 20 copies of the main obj, and they’re all a little different in size and specs (speed, transparency, etc) but what I was wondering was if there is any way I can change the code to make it a little more hectic, or erratic, not so fluid. If there is no way of doing so, it looks pretty good right now. If there is, however, I think it could look awesome. here’s the code I’m using for the object.

onClipEvent (load) {
//stage
movieWidth = 850;
movieHeight = 50;

//mods for ants
i = 1+Math.random()5;
k = 1.2
(-Math.PI)+Math.random()*Math.PI;

//each ant diff
this._xscale = this._yscale=38+Math.random()*30;
this._alpha = 75+Math.random()*100;
this._y = -10+Math.random()*movieHeight;
this._x = -10+Math.random()*movieWidth;
}
onClipEvent (enterFrame) {
rad += (k/70)*Math.PI;
this._y -= Math.cos(rad);
this._x += i;
if (this._x>=movieWidth) {
this._x = -3;
}
if ((this._y>=movieHeight) || (this._y<=0)) {
this._y = -2+Math.random()*movieHeight;
this._x = -3;
}
}

(I apologize for posting the code without one of those code boxes ppl use, I do not know how to do that yet…)

Any help is greatly appreciated! I wanted to congratulate everyone here at kirupa for having a great community, and great help to those that need it. I am so glad to be a part of it.

Luke