Hi everyone!
i want do do a little project for myself but pretty quicky hit a dead end

i wanted to give new purpose to some parts i had lying around so my idea was to re-purpose an old
servo with a broken driver IC to wind up an old mechanical watch.
to power this thing i wanted to use two solar panels from another unfinished project.
however these solar panels are super weak an cannot run the motor on their own. to accomodate for that
i wanted to use two supercapacitors in series (to match the voltage rating to the maximum output voltage of the solar panels).
i was thinking to build a circuit that functions similar to a pythagorean cup (
https://en.wikipedia.org/wiki/Pythagorean_cup)
but i have absolutely no idea how

(see attached schematic).
let me elaborate:
starting from 0V the switch is closed until the capacitors hit around 3V (the solar panels will generate around 3-3.5V at the place where i want to put the whole contraption).
if the voltage rises above that level the switch must go into a closed state until either the capacitors hit 0V or preferably ~1V since the motor starts to go super slow around that mark.
rinse, repeat
to me, it
feels like there should be some simple way accomplish this with diodes/resistors/transistors/capacitors only, but my knowledge of analog circuits is limited

any help/ideas would be greatly appreciated. however i would like to keep the complexity as low as possible and avoid buying exotic components