----------------- Part 5 - Section 2 ----------------- 

Code Sample 5.2.1

"
function FishClass::onWorldLimit(%this, %mode, %limit)
{
   switch$ (%limit)
   {
      case "left":
         %this.setLinearVelocityX(20);
         %this.setFlipX(false);

      case "right":   
         %this.setLinearVelocityX(-20);
         %this.setFlipX(true);
   }
}
"