This is code Bill H wrote.  I'm learning how it works to integrate it into "plant-watering"
It works, so to speak as I can hard code messages to write to the screen.
    As of Jan 2023 and April 22 2023
But I need to go beyond hard coding stuff to write 4-28-23

4-28-23 Cleaned up code, set "Last" and "Next" in void setup