Hong Kong - Maccau - Hong Kong

I am an Indian Passport Holder. I have my return ticket from CHENNAI - HONG KONG - CHENNAI (7-days). During my stay duration, in between I would like to visit Maccau for one or two nights. In that case what type of visa do I need both for Hong Kong and Maccau. Please note that my arrival and departure are both from Hong Kong International airport. Also, can I proceed directly to Maccau after arrival to Hong Kong airport.