Trying primitive generator in Dr.Stone

Dr.Stone is a Japanese animation.
In its story, human being once lost technology ,
and trying to reboot scientific cvilization.
In the episode 8th, they built primitive generator.
I tried it in this movie. (Not so good result. sorry.)
***************** Notice **********************************************
*** N pole and S pole in the explanation figures are misplacement ***
************************************ Sorry ****************************