Automatic cat feeder

Trying to setup an automated cat feeder project from a video I found on youtube. I have all the components ready but I don't understand the code to set it up.

Youtube Video:
https://www.youtube.com/watch?v=sCOkuyH7CPo&list=FLgbO373JFcUEXiVNJf1Fs3A&index=1&t=286s&ab_channel=MomWillBeProud%E2%80%A2DIYchannel