diff --git a/README.md b/README.md
index 3369d9f..c00d748 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,16 @@ ok
 📉 ok
 ```
 
+Here's a Fibonacci implementation:
+```
+> : FIB 2DUP + ;
+ok
+> : FIBN 0 1 ROT 1 DO FIB ROT DROP LOOP SWAP DROP ;
+ok
+> 10 FIBN .
+55 ok
+```
+
 And, of course, it knows how to quit:
 
 ```