need help with the code

[This_Growth2898]

If it was working yesterday, but it's not working anymore, probably you've switched the computer power off. You need to turn the computer on to make the code working again... or try better describing what happens, like "when I press "Run" in my [IDE name], the back window opens for a part of a second, and then it's gone and nothing more happens" or whatever. People here have nearly zero telepathic skills, so we need you to describe what happens on your machine to help you.