Go the the website http://zackexplosion.github.io/github-contridrawer/.
Select a image file and ouput a shell command to drawing on your github contribution block.
If you like Jobs, draw he's name on your github!
This app reads image with HTML 5 file api, and scale the image height to 7 pixel to git github's contribution size. And export a shell command let you run with your own git repository.
Fork the project and run following command in the project folder
npm install && bower install
Then gulp serve to start dev server, make sure your gulp version is newer than 3.9