[emullen@klaatu ~]$ ls
a.sh  countdown  dcdls  makeNfiles
[emullen@klaatu ~]$ cat a.sh 
#!/bin/bash

#demo from slides to show export behavior

echo $x
export x=12
[emullen@klaatu ~]$ emacs countdown 
[emullen@klaatu ~]$ ./countdown blackberry cranberry strawberry marionberry halle-berry
blackberry cranberry strawberry marionberry halle-berry
cranberry strawberry marionberry halle-berry
strawberry marionberry halle-berry
marionberry halle-berry
halle-berry
[emullen@klaatu ~]$ emacs countdown