Hello Andrew!
60yrs? Hmmm.. When I reach 60 years old, might be an expert on this field like the others and you!
You got the idea on two limit switch'coz the Solar Panel frame I've made is limit to 45 degrees east and 45 degrees west.
Disregarding the
"if b0 = b1 then start 'if equal do nothing
if b0 > b1 then greater 'if greater, check how much greater
if b0 < b1 then lesser 'if lesser, check how much lesser
and other supporting lines will turn the motor on high speed
back and fort direction. The idea of like "SUN Flower" makes no sense at all. What do you think? (pardon my bad english)