if (m_pParticle)
      {
         if ( isBottomScreen )
         {
            the.Screens->getBottomScreen()->remove(m_pParticle);
            the.Screens->getTopScreen()->remove(m_pParticle);
            the.Screens->getBottomScreen()->add( m_pParticle );
         }
         else
         {
            the.Screens->getTopScreen()->remove( m_pParticle );
            the.Screens->getBottomScreen()->remove(m_pParticle);
            the.Screens->getTopScreen()->add( m_pParticle );
         }
         m_pParticle->getPS().clearParticles();
         m_pParticle->getPS().clearActions();
         m_pParticle->getPS().setActive(true);
      }
      else
      {
         // create ParticleObject
         // set AUTO_REMOVE as false, so the ParticleObject can be used in multiple steps
         // (call ParticleObject::setRemove() in destructor to remove explicitly)
         // Is it better to set AUTO_CLEANUP true, and re-create ParticleObject when needed?
         m_pParticle =  new ParticleObject(128, RendererRef(), /*ParticleObject::AUTO_CLEANUP*/0 /*| ParticleObject::AUTO_REMOVE*/, 0);

         m_pParticle->setCameraIndex( Screens::CAMERA2D );
         m_pParticle->setPriority(PRIORITY_FOREGROUND);
         if ( isBottomScreen )
         {
            the.Screens->getBottomScreen()->add( m_pParticle );
         }
         else
         {
            the.Screens->getTopScreen()->add( m_pParticle );
         }
      }