Creating two instances of Appium server

I need to create two instances of appium on windows machine for running android tests in parallel. I have gone through documentation and found command, but I don’t know how to execute. I tried windows command line it does not works. Please explain me the steps.

See if this helps: Launching and stopping appium server programmtically

For the future you may want to list the command you are using and the steps you are taking as well as any errors you are getting. Without that you are relying on the collective guesswork of dogooders.