comammand to wipe buffer and save view

I have this command in my vimrc which I got from the internet:

command! Kwbd let kwbd_bn= bufnr("%")|enew|exe "bdel ".kwbd_bn|unlet kwbd_bn

this keeps the view but I would prefer to have another buffer from the list opened in the window instead of a new one. If no other buffer in the list then it should create a new one.

Any idea on how to do this or pluggins that implement this?

Thanks!

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