2 files changed, 4 insertions, 0 deletions

diff --git a/README.md b/README.md
index 4cb5440..21005a5 100644
--- a/README.md
+++ b/README.md
@@ -198,6 +198,10 @@ PSF Text in fbgl
 
 ![text](./docs/text.png)
 
+Simple ray casting demo
+
+![ray](./docs/ray_demo.gif)
+
 ---
 
 ## Contact
diff --git a/docs/ray_demo.gif b/docs/ray_demo.gif
new file mode 100644
index 0000000..399c0bc
--- /dev/null
+++ b/docs/ray_demo.gif