After i (re)found my tablet, restarted to work a bit with curly code effect ‘unit’. Experimenting with double feedback and so, i found this kind of structure.
So i made a small patch, working like this:
1. draw some points with the tablet
2. offset the points with the tablet upper and lower button
3. slow down the offset with a button
4. clear with another one
if anyone wants to try , i can share as an application.