while :
do
   if test -f NEWFILES
   then
      cd lib
      for i in shp wld mob obj zon
      do
         cp big.$i tinyworld.$i
      done
      cd ..
      rm NEWFILES
   fi
   if test -f dms
   then
      mv dms DMS
   fi
   ./DMS 2150
   sleep 30
done