Press the green flag. Use the mouse to click or drag on the stage. Press space to delete everything you have drawn. Press b to change the background: black / 10-step squares. Tryck på b om du vill byta bakgrund: svart / 10 stegs rutor. Tryck på mellanrum om du vill radera allt du ritat. Experimentera med att ändra koden på olika sätt. Remixa gärna.
For LCL 2022 (translation of an earlier project of mine). The other background, a coordinate system, was made with Mathematica.