diff --git a/Tutorial/SimpleAtariExample.ino b/Tutorial/SimpleAtariExample.ino
index 08627a2..45116fc 100644
--- a/Tutorial/SimpleAtariExample.ino
+++ b/Tutorial/SimpleAtariExample.ino
@@ -15,7 +15,7 @@
 // 9-pin D-connector pin 8 to GND
 
 
-// We keep record how everything was last time, so we can compare if anything have changed.
+// We keep record how everything was last time, so we can compare if anything have changed. (1 = off, 0 = on)
 byte lastUP = 1;
 byte lastDOWN = 1;
 byte lastLEFT = 1;