@I|:@EN\| ZJ @I|*.DIR\ "F 
No Subdirectories

 ^C '| HXC HK MC
! AT THIS POINT 'C' CONTAINS THE EN COMMAND, AND FILES HAVE BEEN FOUND!
! FILL THE BUFFER WITH ALL THE TOP-LEVEL DIRECTORIES !
<:EN; G* I
 > J :@S\]\ "F 
No Subdirectories

 ^C ' 

Subdirectories of 
 0T 



 -C 0,.XA J < FS].; FS.DIR;]; 1D L >
J < :S: "F^C' 
   
 T -4C
@I|:@EN\| L -2C @I|*.DIR\ "F @O!L3! '
! GATHER UP ALL THE SECOND LEVEL DIRECTORIES !
.U4 0U5 <:@EN\\; G* Q5+1U5 @I\
\ > Q4J
Q5< 0L @FS\]\.\ @FS\.\]\ 0L

      
 @S\:\ .U1 @S\]\ Q1,.T 


 0L @FS\DIR;\\ 1D 0L .U2
! GATHER UP ALL THE THIRD LEVEL DIRECTORIES !
@I%@:EN\% L -2C @I%*.DIR\ "F @O!L4! '
.U6 0U7 <:@EN\\; G* Q7+1U7 @I\
\ > Q6J
! GO FOR FOURTH LEVEL!
Q7< 0L @FS\]\.\ @FS\.\]\ 0L

         
 @S\:\ .U1 @S\]\ Q1,.T 


 @S\R;\ 0,.+1K > !L5! !L4! %
Q2,.XP Q2,.K MP > !L3! !L2! |
0,.XN 0,.K MN L>