Download .fla

var radius = 80;
var perspective = 100;
var magnification = 100;
var degrees = 0;

onEnterFrame = function(){
angle = degrees * (Math.PI/180);
degrees += 2;

xposition = radius * Math.cos(angle);
yposition = radius * Math.sin(angle);
zposition = radius * Math.sin(angle);

distance = 1 / (1-(zposition/perspective));

ball_mc._x = (xposition*distance) + Stage.width/2;
ball_mc._y = yposition + Stage.height/2;

ball_mc._xscale = distance*magnification;
ball_mc._yscale = distance*magnification;

updateAfterEvent();
}