this.moveTo = function(x, y)
      {
        var i, blobPos; 
        
        blobPos = this.middlePointMass.getPos(); 
        x -= blobPos.getX(x); 
        y -= blobPos.getY(y); 
  
        for(i = 0; i < this.pointMasses.length; i++)
        {
          blobPos = this.pointMasses[i].getPos(); 
          blobPos.addX(x); 
          blobPos.addY(y); 
        }
        blobPos = this.middlePointMass.getPos(); 
        blobPos.addX(x); 
        blobPos.addY(y); 
      }
      this.setSelected = function(selected)
      {
        this.selected = selected; 
      }