I have a question about verilog!

You may checkout the webpage below to help you on the Verilog design.

https://www.intel.com/content/www/us/en/programmable/support/support-resources/design-examples/desig...

Other than that, our Quartus tool has a variety of Verilog design template in which you can just pop it into your project and use it right away.

Example:
In the new created Verilog .v file, right-click on the black space to opens the context menu, scroll to Insert Template, a window Insert Template will pop up, choose Verilog HDL > Full Designs > Counters > Binary Counter.