I want to code a video game,what code would make trees,buildings and stuff appear?

Question

And what code would make characters move?

Answer 1

You need to know this, learn Python and Pygame if you wanna make a simple game in 2D.

Pygame (Python Game Development) Playlist: https://www.youtube.com/playlist?list=PL6gx4Cwl9DGAjkwJocj7vlc_mFU-4wXJq

Or Unity and C#

Unity C# Scripting Tutorial For Beginners-Learn C# For Unity Game Development: https://www.youtube.com/playlist?list=PLytjVIyAOStpT8xJyijH4uG4nEPexvj18

Unity C# Beginner Tutorial Series: https://www.youtube.com/playlist?list=PLivfKP2ufIK7SCuf1Sevu196JhgKMX42T

Unity official tutorials: https://unity3d.com/learn/tutorials/s/scripting

Answer 2

For 3D experience you might try pyglet module. After tinkering a bit with it I think it's fairly easy to use and still has powerful enough OpenGL capabilities.

Have a look (Python+pyglet):
https://www.instagram.com/p/BQ-8ubDDTNi/
(watch until the end ;)