How do you change a light bulb ceiling fitting?

one glass or plastic will have a screw in it or possibly the top unscrews when you get the panel off unscrew the old bulb to your left until it is free from the socket then with the new bulbreverse the procedure turning the bulb to your right, a friendly reminder as to how to unscrew and screw in your new bulb is; lefty- loosey and righty-tightythen secure the cover and enjoy the night time illumination you have brought back to your property