• For instance
     Fif exist  zz%%4.ps DEL zz%%4.ps 
     Fif exist zz%%4.ppm DEL zz%%4.ppm 
     Fdvips -T 14in,14in -Ppdf -f %%1 -pp %%2  -o zz%%4.ps 
     Fgswin32c -sDEVICE=ppm -sOutputFile=zz%%4.ppm -q -dbatch -dNOPAUSE zz%%4.ps -c quit 
     Fmove zz%%4.ppm yz%%4.ppm 
     Fpnmcrop  yz%%4.ppm > zz%%4.ppm 
     Fif exist %%3 DEL %%3 
     Fppmtogif -interlace -transparent 1,1,1 zz%%4.ppm > %%3 

  • The specialized scripts may, for instance, maintain global caches of gifs for cutting down on recompilation time.