Below are some helpful links I have found. 

• This Tikzcd editor site is really convenient for drawing commutative diagrams in Latex
  https://tikzcd.yichuanshen.de/?fbclid=IwAR2PEPPuNFauH0r_YN5u_KeaFLyuEk0cawdYp2jmvsC9W7AFwXZkojrpHdk.

• A simulation of the Curve Shortening Flow
  https://a.carapetis.com/csf/?fbclid=IwAR1NTPTsnFt4rrIRDIjjScMQFvXJJk1zacRyLSuv0oiIbCp1znZPuH-TvR0.