Run this and leave it going to impress non-CS people.

get-coffee.bash

#!/bin/bash

while true; do
  echo -n '  ';
  head -10 /dev/urandom | hexdump -C | head -3 | cut -d' ' -f2-18 | tr "\n" " " | \
    sed -e 's/[0-9a-f][0-9a-f]/\x1b[34m&\x1b[0m/g' | \
    sed -e 's/[a-c][0-3]/\x1b[41m&\x1b[0m/g' | \
    sed -e 's/[d-f][4-6]/\x1b[42m&\x1b[0m/g' | \
    sed -e 's/[0-3][0-3]/\x1b[9m&\x1b[0m/g' | \
    sed -e 's/[4-6][4-6]/\x1b[7m&\x1b[0m/g' | \
    sed -e 's/[7-9][7-9]/\x1b[33m&\x1b[0m/g';
  echo;
  sleep .05;
done

curl -s https://raw.github.com/gist/1944773/ | bash