Hmmm...that didn't seem to do it. I want to have my macro run, and
then restart at A21, and all subsequent lines within the macro to also
be 20 lines down (A21 moves to A22, B22 to B21, B23 to C21, etc etc),
and then to restart the whole thing again another 20 lines down
(restarting this time at A41 to A42, B42 to B41, B43 to C41), and
restarting every 20 lines up to line 8100. Possibly I inserted your
solution incorrectly into my macro...
Again, I am a macro novice, so you may have to spell it out for me.

Thanks much!
Stephen