diff --git a/lec40_git/Diamond.java b/lec40_git/Diamond.java
new file mode 100644
index 0000000..3edffe0
--- /dev/null
+++ b/lec40_git/Diamond.java
@@ -0,0 +1,14 @@
+import java.awt.Color;
+
+public class Diamond implements PartyShape {
+    public void draw(Turtle t) {
+        t.setColor(Color.GREEN);
+        // Draw a diamond using primitive turtle moves
+        for (int i = 0; i < 2; i++) {
+            t.forward(60);
+            t.turnRight(110);
+            t.forward(60);
+            t.turnRight(70);
+        }
+    }
+}
\ No newline at end of file