diff --git a/main.S b/main.S
index 7897021..977cf2d 100644
--- a/main.S
+++ b/main.S
@@ -53,7 +53,7 @@
 
   .section ".data"
 screendata:
-  .rept 60
+  .rept 60 ;; number of leds in hardward
   .byte 0
   .endr
 screendataend: