diff --git a/src/shimmers/sketches/patterns_shifted.cljs b/src/shimmers/sketches/patterns_shifted.cljs
index 2969382cd..fab3dd78b 100644
--- a/src/shimmers/sketches/patterns_shifted.cljs
+++ b/src/shimmers/sketches/patterns_shifted.cljs
@@ -3,9 +3,10 @@
    [clojure.set :as set]
    [shimmers.common.svg :as csvg :include-macros true]
    [shimmers.common.ui.controls :as ctrl]
+   [shimmers.common.ui.debug :as debug]
    [shimmers.math.deterministic-random :as dr]
    [shimmers.math.geometry.collisions :as collide]
-   [shimmers.math.geometry.triangle :as triangle]
+   [shimmers.math.geometry.polygon :as poly]
    [shimmers.sketch :as sketch :include-macros true]
    [shimmers.view.sketch :as view-sketch]
    [thi.ng.geom.circle :as gc]
@@ -15,6 +16,7 @@
    [thi.ng.geom.vector :as gv]
    [thi.ng.math.core :as tm]))
 
+(defonce defo (debug/state []))
 (def width 800)
 (def height 600)
 (def bounds (rect/rect 0 0 width height))
@@ -22,9 +24,9 @@
   (gv/vec2 (* width x) (* height y)))
 
 (defn random-shape [size]
-  (dr/weighted
-   {(triangle/inscribed-equilateral (gv/vec2) size 0) 2
-    (rect/rect size) 0}))
+  (let [n (dr/weighted {3 8 4 4 5 1 6 2 7 1 8 1})
+        r (poly/circumradius-side-length n size)]
+    (poly/regular-n-gon n r)))
 
 (defn gen-shapes [size shape n]
   (loop [structure [shape]
@@ -37,27 +39,33 @@
             mid (tm/mix fp fq 0.5)
             structure-face (g/normal (tm/- fq fp))
             shape (g/rotate (random-shape size) (g/heading (tm/- structure-face)))
-            pos (tm/- mid (tm/* structure-face 0.4))
-            shape' (g/translate shape pos)
+            apothem (poly/apothem-side-length (count (g/vertices shape)) size)
+            pos (tm/- mid (tm/normalize structure-face (+ apothem 0.01)))
+            shape' (g/center shape pos)
             edges (drop 1 (sort-by (fn [[p q]] (g/dist-squared mid (tm/mix p q 0.5)))
-                                   (g/edges shape')))]
-        (if (or (not (collide/bounded? bounds shape'))
-                (some (fn [s] (collide/overlaps? s shape')) structure))
-          (recur structure
-                 (disj faces face)
-                 annotation)
+                                   (g/edges shape')))
+            inside? (collide/bounded? bounds shape')
+            overlaps? (some (fn [s] (collide/overlaps? s shape')) structure)]
+        (swap! defo conj
+               {:shape shape
+                ;; :faces faces
+                :face face
+                :added [inside? overlaps?]})
+        (if (and inside? (not overlaps?))
           (recur (conj structure shape')
                  (set/union (disj faces face) (set edges))
-                 (conj annotation (gc/circle mid 2.0))))))))
+                 (into annotation [(gc/circle mid 2.0)]))
+          (recur structure
+                 (disj faces face)
+                 annotation))))))
 
 (defn shapes []
-  (let [starting (vary-meta (g/center (random-shape (* 0.05 height))
+  (let [size (* 0.08 height)
+        starting (vary-meta (g/center (random-shape size)
                                       (rv 0.5 0.5))
-                            assoc :stroke-width 2.0)
+                            assoc :stroke "#772222")
         {:keys [structure annotation faces]}
-        (gen-shapes (* 0.05 height)
-                    starting
-                    32)]
+        (gen-shapes size starting 32)]
     (conj (concat structure annotation)
           (csvg/group {:stroke-width 2.0}
             (mapv (fn [[p q]] (gl/line2 p q)) faces)))))
@@ -68,6 +76,7 @@
                    :stroke "black"
                    :fill "none"
                    :stroke-width 0.5}
+    (reset! defo [])
     (shapes)))
 
 (defn page []
@@ -75,7 +84,8 @@
     [sketch/with-explanation
      [:div.canvas-frame [scene]]
      [view-sketch/generate :patterns-shifted]
-     [:div.readable-width]]))
+     [:div.readable-width
+      [debug/display defo]]]))
 
 (sketch/definition patterns-shifted
   {:created-at "2024-05-23"