Follow The Leader (with hyperactive circles)!!

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//declare variables
var r = 0;
var s = .4;
var t = .75;
var u = 1;
var v = 1.35;
var w = 1.5;
var z = 0;

function circles() {

var a = Math.sin(r)* -2;
var a = ((a + 1)/2)*200;
ycircle._x = a ;


var b = Math.cos(r)* Math.random();
var b = ((b + 1)/2)*200;
ycircle._y = b ;

r += .074;
r = r % 6.28;

//

var c = Math.sin(s)* -2;
var c = ((c + 1)/2)*200;
ycircle2._x = c ;


var b = Math.cos(s)* Math.random();
var b = ((b + 1)/2)*200;
ycircle2._y = b ;

s += .075;
s = s % 6.28;

//

var d = Math.sin(t)* -2;
var d = ((d + 1)/2)*200;
ycircle3._x = d ;


var e = Math.cos(t)* Math.random();
var e = ((e + 1)/2)*200;
ycircle3._y = e ;

t += .075;
t = t % 6.28;

//

var f = Math.sin(u)* -2;
var f = ((f + 1)/2)*200;
ycircle4._x = f ;


var g = Math.cos(u)* (Math.random()/1.5);
var g = ((g + 1)/2)*200;
ycircle4._y = g ;

u += .075;
u = u % 6.28;

//

var h = Math.sin(v)* -2;
var h = ((h + 1)/2)*200;
ycircle5._x = h ;


var i = Math.cos(v)* (Math.random()/3);
var i = ((i + 1)/2)*200;
ycircle5._y = i ;

v += .075;
v = v % 6.28;

//

var j = Math.sin(w)* -2;
var j = ((j + 1)/2)*200;
ycircle6._x = j ;


var k = Math.cos(w) * (Math.random()/4);
var k = ((k + 1)/2)*200;
ycircle6._y = k ;

w += .0775;
w = w % 6.28;

var l = Math.sin(r);
var l = ((((l + 1)/2)*50)+50);
ycircle6._alpha = l;

z = z + .1;
z = z % 50;

}

// associate a function with the enterFrame event
ycircle.onEnterFrame = circles;