#!/bin/sh

# The above line is called a ‘hashbang’ and tells the operating
# system how to execute this script. We did not need those before,
# because we always executed our scripts by typing ‹sh script.sh› --
# we executed the shell and passed the script as its first argument.
# But now, we will want to execute scripts like normal programs, and
# for that, we need a hashbang.

# We also need to make the script executable, by giving it the ‹x›
# permission bit. I have done that for you on this script, but if
# you want to make your own executable scripts, the command is: 
#
#    $ chmod +x script.sh

# That being said, we can happily run an infinite loop, because the
# purpose of this script is to do nothing interesting, but to do it
# long enough to let us poke at the process running it.

while true; do sleep 1; echo .; done
