Build me a simple powershell script

Hello, I would like to learn Powershell and looking for someone to build me a simple sample Powershell script to do something. The code sample can do anything: it can be app code, it can provision infrastructure, manage a process, whatever. It could even organize photos on my desktop, or download playlists from spotify or something that is totally cool! I'm looking for code that you can easily walk me through (by adding detailed commentary to each line to explain what is happening which will help me learn). I would also like you to share what best practices you used to write the code, so I can also understand that. In terms of length, it can be a few smaller files or preferably one longer file that has more structure, but nothing too complex! I want to be able to digest it!