Complex sentence: He immediately began developing and working with producer Colin Brittain on several projects, amidst writing and co-producing Steve Aoki's single "Back 2 U," which features vocals by WALK THE MOON.
Split into simpler sentences: He immediately began developing and working with producer Colin Brittain. He wrote and co-produced Steve Aoki's single "Back 2 U," which features vocals by WALK THE MOON.