offRight = false;
    offLeft = false;
    offTop = false;
    offBottom = false;
    
    if (this.x > rightBorder){
      offRight = true;
    }
    
    if (this.x < leftBorder){
      offLeft = true;
    }
    
    if (this.y > bottomBorder){
      offBottom = true;
    }
    
    if (this.y < 0){
      offTop = true;
    }

    if (this.boundAction == WRAP){
      if (offRight){
	this.x = leftBorder;
      } // end if
  
      if (offBottom){
	this.y = topBorder;
      } // end if
  
      if (offLeft){
	this.x = rightBorder;
      } // end if
  
      if (offTop){
	this.y = bottomBorder;
      }
    } else if (this.boundAction == BOUNCE){
      if (offTop || offBottom){
	this.dy *= -1;
	this.calcSpeedAngle();
	this.imgAngle = this.moveAngle;
      }
      
      if (offLeft || offRight){
	this.dx *= -1;
	this.calcSpeedAngle();
	this.imgAngle = this.moveAngle;
      }
      
    } else if (this.boundAction == STOP){
      if (offLeft || offRight || offTop || offBottom){
	this.setSpeed(0);
      }
    } else if (this.boundAction == DIE){
      if (offLeft || offRight || offTop || offBottom){
        this.hide();
        this.setSpeed(0);
      }
      
    } else {
      //keep on going forever
    }
  } // end checkbounds