PPF 1

PPF1:

https://docs.google.com/presentation/d/e/2PACX-1vTSJSpnRrT98s92kvi3ehZpKVXbln3bx8YbH8EOO-gtEm4yD_oauZPv4k0Ywc8EIj8hyd2z2zV3Hj0X/pub?start=true&loop=true&delayms=3000