diff --git a/examples/SmoothDoubleBuffer/SmoothDoubleBuffer.ino b/examples/SmoothDoubleBuffer/SmoothDoubleBuffer.ino
index 80bd6bf..f7c9f29 100644
--- a/examples/SmoothDoubleBuffer/SmoothDoubleBuffer.ino
+++ b/examples/SmoothDoubleBuffer/SmoothDoubleBuffer.ino
@@ -29,7 +29,12 @@ void setup()
   
   start_x = display->width();
 }
-
+/*
+ This example draws a red square on one buffer only, and a green square on another buffer only.
+ It then flips between buffers as fast as possible - to give the impression they're both on screen at the same time!
+ 
+ The only thing that's painted to both buffers is a blue square.
+ */
 const int square_size = 16;
 void loop() 
 {   
@@ -63,4 +68,4 @@ void loop()
  
   if (start_x < (-1*square_size)) start_x = display->width()+square_size;
   
-}
\ No newline at end of file
+}