diff --git a/Examples/example13-e.escad b/Examples/example13-e.escad
new file mode 100644
index 0000000..89ff3a6
--- /dev/null
+++ b/Examples/example13-e.escad
@@ -0,0 +1,5 @@
+/* Example 13 - The rounded union of a cube and a sphere. */
+union {
+  cube ([0,0,0],[20,20,20]);
+  translate ([20,20,20]) sphere (15);
+}
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diff --git a/Examples/example20.escad b/Examples/example20.escad
new file mode 100644
index 0000000..04db065
--- /dev/null
+++ b/Examples/example20.escad
@@ -0,0 +1,6 @@
+union() {
+    square([10, 10]);
+    translate([10, 5])
+        square([10, 20]);
+}
+		
\ No newline at end of file
diff --git a/Examples/example21.scad b/Examples/example21.scad
new file mode 100644
index 0000000..e37daa8
--- /dev/null
+++ b/Examples/example21.scad
@@ -0,0 +1,14 @@
+union()
+{
+    cube([10,20,5]);
+    rotate(30)
+        translate([0,30,0])
+	{
+	    cube([10,20,5]);
+	    rotate(30)
+		translate([0,30,0])
+		{
+		    cube([10,20,5]);
+		}
+	}
+}
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diff --git a/Examples/example22.escad b/Examples/example22.escad
new file mode 100644
index 0000000..fdaf90b
--- /dev/null
+++ b/Examples/example22.escad
@@ -0,0 +1,2 @@
+cube (10);
+cube (10);
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diff --git a/Examples/example23.escad b/Examples/example23.escad
new file mode 100644
index 0000000..f3a8b5a
--- /dev/null
+++ b/Examples/example23.escad
@@ -0,0 +1 @@
+include <example3.escad>;
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