I quickly hacked together a 2D graphics layer for my functional-reactive / dataflow model 'Lucre', with a Processing inspired front API, which allowed me to translate the 'Tree' L-System sketch by Daniel Shiffman. While running smoothly on a laptop, the test on a Pi 4B immediately reveals that my library has hardly usable performance at this stage. First part of the video shows the few-frames-per-second of Lucre2D, followed by the totally smooth animation coming from Processing 3.