Examples in HTML and Javascript.

HTML Teacher V3 (Links Update: 18-05-2022)
https://oxy.name/d/wKxf
https://nitro.download/view/F28263B6DDCE3E0/HTML_Teacher_V3.rar

Javascript Teacher V3 (Links Update: 18-05-2022)
https://oxy.st/d/vKxf
https://nitro.download/view/3260E5BB3054556/JavaScript_Teacher_V3.rar

Screenshots:
https://i.ibb.co/mX9HgzC/html-teacher-v3.jpg

https://i.ibb.co/108YKxR/javascript-teacher-v3.jpg

Use the tool online: HTML Teacher V3
https://files.offshore.cat/ku2SvgqV.html

Use the tool online: JavaScript Teacher V3
https://files.offshore.cat/qRk0on7a.html