Použité materiály:

https://www.youtube.com/watch?v=AShaML1Mh_4
https://www.youtube.com/watch?v=05iP7BLzd-Y&t=283s
-https://www.youtube.com/watch?v=vwYKN4IYoAk&t=212s
- https://www.youtube.com/watch?v=2WNmhvC_gIM
-https://activezdar.rajce.idnes.cz/