Some new-to-me sidewalk chalk art by Kal Zakzouk at 20th and Irving. If it got you thinking "What's up with that triple yin-yang in amongst the eight trigrams?" Wikipedia had some related ideas: Tricolored Taeguk https://en.wikipedia.org/wiki/Taegeuk#Tricolored_taegeuk , Tibetan Gankyil https://en.wikipedia.org/wiki/Gankyil . (or could be artist noodling around with designs, who knows (Making fun of wanna-be billionaires in search of "three commas"?)) #SanFrancisco