Update README.md

Author: PycraftDeveloper

README.md

@@ -25,6 +25,7 @@ The following Python programs HAVE been turned into YouTube videos:
 * `snake expansion.py` in: [[1 hour version] 4K Expansion](https://youtu.be/1dpQ6pDfpAc)
 * `colored light.py` in: [[1 hour version] 4K Coloured Orbs of Light](https://youtu.be/RXvL6IMpEOQ) and Scheduled!
 * `squares.py` in: [[1 hour version] 4K Square Inception](https://youtu.be/hKbF_Vszz3M)
+* `hexagonal.py` in: [[1 hour version] Cascading Scales](https://youtu.be/OYRjXmrKs6s)
 
 The following Python programs WILL LIKELY be turned into YouTube videos soon:
 * `Colored Pixels.py`