Not sure if this has been asked, i could not find anything.

I want to download a webpage and i want to keep downloading it regularly as to
keep a backup so i can see how the webpage changes over time. How do i do this
without overwriting the same files?
I mean how do i download the same webpage to the same project but then be able
to see two different versions in the index in my browser?
Also, is there any way to automate this? So for example, make the program take
a snapshot of the webpage once a day?