diff --git a/examples/Viewport_Demo/Viewport_Demo.ino b/examples/Viewport_Demo/Viewport_Demo.ino
index 1e02ba0..1ee141c 100644
--- a/examples/Viewport_Demo/Viewport_Demo.ino
+++ b/examples/Viewport_Demo/Viewport_Demo.ino
@@ -110,6 +110,8 @@ void loop()
     tft.setViewport(x, y, w, h);
 
     plotBox();
+
+    delay(0);
   }
 }