Pico built-in led

[serhiimakarov]

Is there possibility to use built-in led of pico to show current layer?

For example:

left off + right off -> 0 layer
left off + right on -> 1 layer
left on + right off -> 2 layer
left on + right on -> 3 layer
...

If go further, we also can use blinking led and continue list of layers