

I first found a jazz bass loop on GarageBand that I liked and worked researched the key and tempo of the loop.
I then composed a short three note riff on the piano to compliment and develop the bass line. I did this by identifying the bass line's key and experimenting/improvising tunes in that scale whilst I listened to the bass.
Then I recorded a repeated piano chord that complimented the previous melody.
Lastly, I added a jazz drum loop sourced from GarageBand to reinforce the rhythm of the track and cement the jazz theme.