* When making a change to your code, use the following commands to document the commit: <code>git commit -am "a sensible message"</code> and <code>git push</code>. **Please explain the change you made in your commit message.**

* Before you begin programming, it is important to plan your algorithm. Therefore your first task will be to complete and submit an algorithm document. This document should be named '''algorithm_[student_id].txt'''. This file should be plaintext. The document will contain two sections:

* A description of how the "after()" function works. The "after()" function is provided to you in the assign1.py template. Open the file, and use clear English to describe what line of code does in such a way that a competent programmer could reproduce the code without seeing it firsthand.