This is a simple script to solve a simple problem for taking turns in public services.
In many places you have to take a turn and wait there until your number is reached. Many of these systems work by using a computer and specialized software.
The problem is, that information is not shared online. This simple solution just takes a screenshot and share that file in a website that could be viewed online and is refreshed every 15 seconds.
You still need to be present to take your number, but at least you can see the current status and not be required to be on site if your number is far to be reached.