Just a sketch, playing with “extruded shapes” – basically, 3D geometry in a big long cheese log, doped up with some sinusoidal harmonics.

Some code:

(require fluxus-016/shapes scheme/list) (clear) (define l (build-list 20 (lambda (i) (vector 0 0 (+ 10 (* -1 i)))))) (define w (build-list 20 (lambda (i) (* 1 (+ 1 (sin (* 3.14156 (/ i 20)))))))) ;(define w (build-list 10 (lambda (i) 4))) (hint-wire) (define (sinuside circ complexity) (define (_ c n) (cond [(< n 1) empty] [else (cons (vadd (car c) (vmul (car c) (* 0.3 (sin (* (* complexity 3.1415) (/ n (length circ))))))) (_ (cdr c) (- n 1))) ]) ) (_ circ (length circ)) ) (define circle (sinuside (build-circle-points 80 1) 16)) (define pe (with-state (rotate (vector 0 0 90)) (build-partial-extrusion circle l 1))) (recalc-normals 1) (define (draw-extr e) (with-primitive e (partial-extrude ;(* (length l) (+ 0.5 (* 0.25 (+ (sin (time)) 1)))) (length l) (sinuside (build-circle-points 80 1) (round (* (time) 16))) l w #(0 1 0) 1) ) ) (define (animator) (draw-extr pe) ) (every-frame (animator))