Song Writing Help

Aug 10, 2019

One of my friends is writing a Musical, and has requested that I write the music to go with the lyrics she has written. She has also given me the melody for the lyrics. I'm struggling to come up with the chords for it. It's in A minor, but the 'sound' of the music changes for the first 4 measures to the rest of the song. Anyone have some tips for me?