added sandwitch example

example/README.md

@@ -4,3 +4,5 @@
 ![](tile_T36_5mm.png)
 ![](tile_raw_plate_T24_2x3_2mm.png)
 ![](tile_H_T24_5mm.png)
+![](tile_H_T24_5mm.png)
+![](tile_sandwitch.png)

example/tile_sandwitch.scad

+include<../tile.scad>
+
+translate([ 0, 0, -6 ]) {
+    color("blue") tile_raw_plate(T24, 1, 1, 2);
+    translate([ 0, 0, -12 ]) color("red") tile_screw_pos(T24)
+        cylinder(d = Tscrew_d(T24), h = 8);
+}
+
+color("yellow") tile(T24, h = 5);
+
+translate([ 0, 0, 12 ]) rotate([ 0, 180, 0 ]) {
+    color("blue") tile_raw_plate(T24, 1, 1, 2);
+    translate([ 0, 0, -12 ]) color("red") tile_screw_pos(T24)
+        cylinder(d = Tscrew_d(T24), h = 8);
+}