Click flag and everything else should be simple. Make sure to take in the feel of Google's Material Design. The ending check made of a pen should be a smooth movement with increasing and decreasing pen sizes, but I don't know how to make a pen draw with a smooth movement without it being dashes. If anyone could help, that would be great!
Google for "Share" graphic on beginning FAB. Google for Material Design as a whole. Me for everything else NOT ACTUALLY MY BIRTHDAY