Why I can't output this programming? Who can help me

Question

https://code.sololearn.com/WfT6v0HafLvO/?ref=app

Answer 1

Hi! You are trying to call two external files in the sololern Playground, where you have placed your web file: a file with styles "demo.css", and a file with scripts "demo.js" that are located somewhere unknown. place the contents of these files directly in the web file (there are corresponding sections for this purpose "css" and "js") and remove direct links to them.

Answer 2

Ярослав Вернигора(Yaroslav Vernigora) Ok,very thanks!