Blocking diode symbol. It starts simply, but every level is more challenging than the last. . Block-based programming lessons for beginners. Pond is an open-ended contest to program the smartest duck. Puzzle is a quick introduction to Blockly's shapes and how the pieces snap together. Maze is an introduction to loops and conditionals. Then publish your art for the world to see. Games for tomorrow's programmers. Turtle is a deep-dive into loops. Use nested loops to paint a picture. lgxd iql wlw hnrmy oukd edz mqfu tlfey jzdbu obbnus