https://learningapps.org/watch?v=ptr09eisc22
A. https://www.internet-abc.de/lm-old/computer-abc.html
B. https://learningapps.org/watch?v=p4ibd24sa21
https://studio.code.org/hoc/1?lang=de-DE
https://studio.code.org/s/starwarsblocks/lessons/1/levels/1
https://studio.code.org/s/mc/lessons/1/levels/1