[SWF(width='800',height='600',backgroundColor='0x50464b',frameRate='30')]
          public class @ax-flex-fisix-2 extends MovieClip{
                  private var myEngine:FisixEngine
                  private var txtFPS:TextField
                  
                  public function @ax-flex-fisix-2(){
                          //first, create an instance of the fisixengine object
                          myEngine = new FisixEngine()
                          //turn on physical collision reactions
                          myEngine.setReactionMode(ReactionModes.PHYSICAL)
                          
                          //set the gravity to pull down at a rate of 1 pixel per second
                          myEngine.setGravity(0,1)
                          
                          //first we'll create all the walls
                          //instead of adding the walls directly to the engine, we'll add them to a FisixObject within the engine
                          
                          //create the walls 'group'
                          var walls:FisixObject = myEngine.newFisixObject()
                          walls.makeStatic() //tells the engine the objects in this group won't be moving--extra optimization
                          //create the four walls
                          walls.newSurface(new Vector(0,0),new Vector(800,0))
                          walls.newSurface(new Vector(800,0),new Vector(800,600))
                          walls.newSurface(new Vector(800,600),new Vector(0,600))
                          walls.newSurface(new Vector(0,600),new Vector(0,0))
                          
                          //create some obstacles
                          for(var i:int=0;i<20;i++){
                                  walls.newCircleParticle(Math.random()*800,Math.random()*600,Math.random()*10+10)
                          }
                          
                          //add a circle particle to the surface at position 200,100 with a radius of 50 pixels
                          var particle1:WheelParticle = myEngine.newWheelParticle(200,100,40)
                          particle1.bounce = 0.7
                          particle1.friction = 0.5
                          
                          //add another particle to the right
                          myEngine.newWheelParticle(400,100,40)
                          
                          //turn on primitive rendering
                          myEngine.setRender(true)
                          //tell the engine where to render to
                          myEngine.setRenderGraphics(graphics)
  
                          addEventListener(Event.ENTER_FRAME,onEnterFrame)
                          
                          txtFPS = new TextField()
                          addChild(txtFPS)
                  }
                  private function onEnterFrame(e:Event):void{
                          //this method does everything you need to advance the simulation by one frame
                          myEngine.mainLoop(1)
  
                          txtFPS.text = int(myEngine.getRealFPS()).toString()
                  }
          }
  }