Got it 
First found the clear function and had the flickering.
Next things is to read all 16 potis when value changes and print to the screen the ones which changes. Since I will use only 2 hands only 2 potis at the time can change.
This gonna take me some time to figure out.
like: if A1 has a new value print it then if A2 has a new value print instead where A1 was.
I have already two spots for the values to be shown at the second row of the screen.
this works all fine now with the one A7 poti you gave me as an example.
I am expecting issues in case i change value A1 and A2... how to decide which write on value 1 position and which writes on value 2 position.
on the row it looks like this right now:
p01:000 p02:000
the number after "p" will show the poti number of course and then the value.
I feel silly to ask you every step, but for you it seems a kids game