JavaScript Code on Update n,[br]Row 8: editing the code you have to restore the [b]arrow function[/b] => by removing the automatically inserted space between = and > before saving.[br][br]The PyGgb webapp (Python code)[br][url=https://szacchino.github.io/geogebra/index.html?name=magic+square+n%3D5&code=eJx9U1Fv0zAQfs%2BvOIJQHZp17aYJCSkPDAbiBVF1AmlVVbnJZbVwnWI7WlXgib%2FCz%2BAJ%2FtjOjpM2UjVLSWzfd3ffd3eJCiwBtbEoJS43%2FF6YfI1m%2Bb3mheaWqeR1BLSew0yQIQBVCgU3BgqBcMfXEmp1j5oXCMJYjxclKHgBF5BlMG5CuKW5MAhfuKzxRutKs%2FhdG2JTU8AujkGhgO1H1yO4TOEqhVfJKE6iwOWjElZwKYxAjeCgCnb0vEdZwEZY%2BFQ7lh4dlEAG8%2FkYykrDEshBc0pF8hYnrjq6pNpybbeVoXyVgvL%2F739%2F9UH2BNgdCokwTmG25dIikTg%2Fh4vEh9h7GxXAn0wDyAKk0eKS712oLv8kJcBLeoYwCcU%2FkjH3MRfzJtiCojnvDnXE%2FJpKk68VeraKiP%2FJ19Q9%2BBzEdFDFCUeWZUuXNZszyk8tPAHslLCwc1Q99Cj%2FV1TKTUnTlBWxEdbQ16DdWzcnUBWo4UFo6rpx%2Bt3xJv%2BGUK2QqkHJvEMpVBF6GSarrUWf%2BeJwbqvzrDd8xy0JGjvirR2lwdMe%2FWQ9yKGzfQJR0w%2BNttaqZR1F08xYzZ746SaThEZ9mk1HGreS58jieZxC%2FCNODjcLd%2FOr%2FSeOV%2FR2U7DBbF09fNCiYCUnTckgOVy%2F2aHprsPQNNZb3Fl2y1cS%2FW4wnA4HafxzmcdJys6u0ssktbpG%2FyLfR%2BxlP40%3D]https://szacchino.github.io/geogebra/index.html[/url]