public void setStepWithAnimationSpeed(int step, int fps) {
    int currentFramesPerStep = artist.getFramesPerStep();

    artist.setFramesPerStep(fps);
    artist.setStepNum(step);

    repaint();

    artist.setFramesPerStep(currentFramesPerStep);
  }
 /**
  * Set the step of the panel
  *
  * @param step
  */
 public void setStep(int step) {
   artist.setStepNum(step);
   updated = true;
 }