move from one xterm and back again using wmctrl

I'm running fvwm and have multiple virtual desktops open. I'd like to be able to write a bash script that would take me from one xterm to another---this part is easy, using wmctrl -a ---and then back again, which is the hard part. I imagine that if I could execute a command in the new window once I've passed control to it, then the rest would be easy, but as far as I can tell from the documentation, wmctrl doesn't give me the option to do this. Here's the basic idea of the script I'd like to write #!/bin/bash TmpScreen=CAMILLE CurrScreen=ANDREW wmctrl -R $TmpScreen #echo this line on CAMILLE not ANDREW echo "Type 'GoBack' to return to $CurrScreen" & #Do something on CAMILLE #Type GoBack, which would then execute wmctrl -a $CurrScreen #Be back to where I started Is there a way to accomplish this? Any help would be most appreciated