function draw()
    {
      var canvas = document.getElementById('blob');
      if(canvas.getContext == null)
      {
        return; 
      }
       
      var ctx = canvas.getContext('2d');
  
      ctx.clearRect(0, 0, width, height); 
      
      env.draw(ctx, scaleFactor); 
      blobColl.draw(ctx, scaleFactor); 
    }
    
    function timeout()
    {
      draw(); 
      update(); 
          
      if(stopped == false)
      {
        setTimeout('timeout()', 30); 
      }
    }