; animated recusive spiral
; by @local_guru
(
  (clear) 
  (defn rec 
    (v) 
    (if 
      (gt v 0) 
      (
        (stroke 
          (circle 
            (add 375 
              (mul 
                (cos 
                  (add 
                    (div v 17) 
                    (div 
                      (time) 2000))) 
                (div v 2))) 
            (add 300 
              (mul 
                (sin 
                  (div v 11)) 
                (div v 2))) 
            (div v 2)) 1 "rgba(114,222, 194,0.1)") 
        (rec 
          (sub v 0.3))))) 
  ; set false to stop 
  (animate true) 
  (rec 300))