Well, when you are using natural light you rely mainly on time exposure, so when you are shooting outdoors at night you'll have you alow more time on your shutter speed, on your aperture diameter (the smaller the more light let in) and finally on your ISO (400 is usually a good number, if you go for too high of an ISO the picture will come out grainey).
Please don’t mind my terrible treble and bass clefs :p
Accidentals <span>describes pitches rhythms and tone colors woven together to create layers of sound in a song.</span>