twelve xterms

I squeeze 12 xterms onto two 19inch monitors. I start them with this script:

#!/bin/sh
# each term is 330 high and 1000 wide

# left side left monitor

# col 1
xterm -fg green -bg black -font 8x13 -geom 78x23-2000+50  & 
xterm -fg green -bg black -font 8x13 -geom 78x23-2000+380 & 
xterm -fg green -bg black -font 8x13 -geom 78x23-2000+710 & 

# col 2
xterm -fg green -bg black -font 8x13 -geom 78x23-1000+50  & 
xterm -fg green -bg black -font 8x13 -geom 78x23-1000+380 & 
xterm -fg green -bg black -font 8x13 -geom 78x23-1000+710 & 

# right side left monitor

# col 3
xterm -fg green -bg black -font 8x13 -geom 78x23-750+50  & 
xterm -fg green -bg black -font 8x13 -geom 78x23-750+380 & 
xterm -fg green -bg black -font 8x13 -geom 78x23-750+710 & 

# col 4
xterm -fg green -bg black -font 8x13 -geom 78x23-0+50  & 
xterm -fg green -bg black -font 8x13 -geom 78x23-0+380 & 
xterm -fg green -bg black -font 8x13 -geom 78x23-0+710 &