Try changing the points of the animation and see what happens when you click "See it move!" Pay attention to the other parts of the code as well. When you click the button, you are running the code you see below, telling the blueball to animate its motion to the points you define.

var attributes = { 
   points: { to: [ ,  ] } 
}; 

var anim = new YAHOO.util.Motion('blueball', attributes); 

anim.animate();