That 's OK thx !
I add the 8step sequence also on the twelfth pin of the rotary switch (that was not used) to have it near the Random one 
A short vid
Nothing has changed in the code compared to the old version. I change the order of 3 resistors, 2 wires to move, add the rotary switch and it’s done. A tip for anyone with the old version: it’s definitely worth it 