public void timingEvent(float fraction){
  current.x=(int)(start.x + (end.x - start.x) * fraction);
  current.y=(int)(start.y + (end.y - start.y) * fraction);
  track.setCarPosition(current);
}

public void timingEvent ( float fraction ) { current . x = ( int ) ( start . x + ( end . x - start . x ) * fraction ) ; current . y = ( int ) ( start . y + ( end . y - start . y ) * fraction ) ; track . setCarPosition ( current ) ; }
timingtarget implementation : calculate and set the current car position based on the animation fraction
