diff --git a/src/experimental/demo/contours_demo.scad b/src/experimental/demo/contours_demo.scad
deleted file mode 100644
index 6fc0b61a..00000000
--- a/src/experimental/demo/contours_demo.scad
+++ /dev/null
@@ -1,21 +0,0 @@
-use <hull_polyline2d.scad>;
-use <util/rand.scad>;
-use <noise/nz_perlin2.scad>;
-use <contours.scad>;
-
-seed = rand(0, 256);
-points = [
-    for(y = [0:.2:10]) [
-        for(x = [0:.2:10]) [x, y, nz_perlin2(x, y, seed)]
-    ]
-];
-
-
-for(isoline = contours(points, 0.1)) {
-    hull_polyline2d(isoline, width = .1);
-}    
-
-translate([12, 0]) 
-for(isoband = contours(points, [-.2, .2])) {
-    polygon([for(p = isoband) [p[0], p[1]]]);
-} 
\ No newline at end of file
diff --git a/src/experimental/demo/vrn2_cells_from.scad b/src/experimental/demo/vrn2_cells_from.scad
deleted file mode 100644
index 190471c6..00000000
--- a/src/experimental/demo/vrn2_cells_from.scad
+++ /dev/null
@@ -1,22 +0,0 @@
-use <hull_polyline2d.scad>;
-use <shape_square.scad>;
-use <voronoi/vrn2_cells_from.scad>;
-
-xs1 = rands(-20, 20, 15);
-ys1 = rands(-20, 20, 15);
-points = [for(i = [0:len(xs1) - 1]) [xs1[i], ys1[i]]];
-
-cells = vrn2_cells_from(points);
-for(i = [0:len(points) - 1]) {
-    pt = points[i];
-    cell = cells[i];
-    
-    linear_extrude(1)
-        hull_polyline2d(concat(cell, [cell[0]]), width = 1);
-    
-    color(rands(0, 1, 3))
-    translate(pt)    
-    linear_extrude(2, scale = 0.8)
-    translate(-pt)    
-        polygon(cell);
-}
\ No newline at end of file