Rather late to the party but here's my take on the Rockwell rhythm:
spoiler
setcps 0.7
d1 $ slow 2 $ n "[~ t!! . t(5,16)]" |> note "[c . cs d d]" |+ note "<0 7>" |> sound "bass:1"
To my ear the euclidean rhythm is a better fit than the triplets in the other attempts here. @tedthetrumpet and @hujairi nailed the chords though. I'd love to have that skill.