Adam-

It looks like the code on that blog belonged to the previous version of Scriptographer. I think this is the code you're looking for:

function createCircle ()
{
var newSize = 50 * Math.random() ;
var x = 400 * Math.random() ;
var y = 400 * Math.random() ;
rect = new Rectangle(y, x, y + newSize, x + newSize);
activeDocument.createOval(rect);
}
createCircle();

Thank you Alex, now it works just great! Thanks a lot

well, it did not cross my mind it is possibly for the old version of SG. But update would be great :) as well as any following parts... I think not only me would be pleasured.