diff --git a/src/experimental/demo/px_surround_demo.scad b/src/experimental/demo/px_surround_demo.scad
new file mode 100644
index 00000000..643f4eef
--- /dev/null
+++ b/src/experimental/demo/px_surround_demo.scad
@@ -0,0 +1,27 @@
+use <pixel/px_circle.scad>;
+use <pixel/px_polyline.scad>;
+use <shape_pentagram.scad>;
+use <hull_polyline2d.scad>;
+use <experimental/px_surround.scad>;
+
+pts = px_circle(10, true);
+for(p = pts) {
+    translate(p)
+        square(1, center = true);
+}
+#hull_polyline2d(px_surround(pts), width = .1);
+
+
+pentagram = [
+    for(pt = shape_pentagram(15)) 
+        [round(pt[0]), round(pt[1])]
+];
+pts2 = px_polyline(concat(pentagram, [pentagram[0]]));
+translate([30, 0]) {
+    for(pt = pts2) {
+        translate(pt) 
+            linear_extrude(1, scale = 0.5) 
+                square(1, center = true);
+    }
+    #hull_polyline2d(px_surround(pts2), width = .1);
+}
\ No newline at end of file