Codex Saqqara is a cycle of five semi-improvised musical pieces for live coding and electric violin. Here, for duration reasons, we present a short excerpt. The interaction between the two performers takes place through a system that allows the violinist to record and overdub up to five samples in real-time, which are then processed and organized into structures by the live coder. In this way, the two musicians interact with each other's musical space, taking on different musical roles during the performance, such as soloists, orchestrators or accompanists. Given its extemporaneous nature, the piece is composed from-scratch, following a series of macro-structures determined beforehand. This submission accompanies a paper regarding the system used, along with some reflections that emerged during the rehearsals for this performance.