.profile

# add this line at the end of the file
python ~/.psam.py

.psam.py

# print prodigalsam's latest tweet

import json, urllib2

a = urllib2.urlopen('https://api.twitter.com/1/statuses/user_timeline.json?screen_name=prodigalsam&count=1').read()
b = json.loads(a)

print '\n' + b[0]['text'] + '\n'

download .psam.py to your home directory on your mac and add python .psam.py on the last line of of your ~/.profile file

…if you don't know how to do that, then you shouldn't because you'll never see it in action anyways ;)