#Behaviour of the stepping switch

Each time the button is actuated, the steps:

* increment sequentially and start again from level 1: **Pass through** of levels 1, 2, 3, ... 7, then levels 1, 2, 3, ...
* increment first, then decrement again: **Flow and return** of step 1, 2, 3, ... 7, back to step 6, 5, 4, ... 1 then again with step 2, 3, 4, ...