This code could maybe do it:
I try to implement warp fonction but it doesnt works. I'm not sure
i understand what is it supposed to be.
Up and Down could have différent speed 0.001,0.1,...
I don't know how to make random inside the code..
rand 1 activate the random entry..
Reset must be 1 and after 0 to works..
value = x;
change = a+b;