Script to Upload files to the server, and to download files to local machine

Hi,
I'm new to WinSCP script, so I need a help on how I can write a script that upload files to the server, and another script to download files from the server to local machine/computer.
Or if there is a link where I can learn it step by step.
Thank you in advance.

Please start here:
https://winscp.net/eng/docs/guide_automation