.key file1,file2,file3,file4
if not exists <file1>.r
   echo "File <file1>.r does not exist.  Try again."
   quit 20
endif
if not exists <file2>.r
   echo "File <file2>.r does not exist.  Try again."
   quit 20
endif
if not exists <file3>.r
   echo "File <file3>.r does not exist.  Try again."
   quit 20
endif
if not exists <file4>.r
   echo "File <file4>.r does not exist.  Try again."
   quit 20
endif
blink drlib:drstart.o+<file1>.r+<file2>.r+<file3>.r+<file4>.r lib drlib:drio.lib+drlib:draco.lib+drlib:dos.lib+drlib:exec.lib to <file1> smallcode
