Can anyone please tell me how to make a 3d shape instead of a 2d shape

Here is the first information: https://www.sololearn.com/learn/CSS/2256/

This will help you too: https://code.sololearn.com/WXE9xL39QdIL/?ref=app

Thanks Ja play and Abdulsalam😊😊😊😊😊👍👍👍👍👍