Gravity in java script

Question

how i can make a code with gravity system?

Answer 1

https://m.youtube.com/watch?v=3b7FyIxWW94
🎥 How to Code: Gravity - YouTube
https://www.w3schools.com/graphics/game_gravity.asp
Game Gravity - W3Schools

Answer 2

https://code.sololearn.com/WdFZOW0T4pBu/?ref=app
Look, I can link things, too.

Answer 3

https://code.sololearn.com/W2c82c0r0k3K/?ref=app

I didnt know how to make gravity so i did this.