The actual parts needed in your project are:
The 8channel drone set, which is going to be connected with the Wi-Fi.(what out the Atmega processor)
The outer casing for holding the pizza bag. This should be opened by the “face detection method” this ensures the door step service.
The cash sold be strictly paid online through credit card or net banking.
The security camera which capture the photo of a delivery receiver.
" Now Enjoy the pizza party".