Please add license for permission

[Poikilos]

Hi, please add a license because: https://choosealicense.com/no-permission/

The easy way is:

• Log into GitHub, go to https://github.com/abhi12ravi/PythonClock
• Add File, Create New File
  • Change the name to license.txt and GitHub's license chooser button will appear:
    • Click the "Choose a license template" button that appeared on the right then choose the one you want and add your name and 2012 if not autofilled.
  • Change the branch to (commit directly to) "master" at the bottom.
  • Click "Commit new file"