From 9ee60da4d692ba2e5a92f1b979e7624e08e80e45 Mon Sep 17 00:00:00 2001
From: Alan Wang <44191076+alankrantas@users.noreply.github.com>
Date: Fri, 29 Jan 2021 09:28:07 +0800
Subject: [PATCH] Update README.md

---
 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 08cd358..9139c8e 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 
 See also [BBC micro:bit MicroPython documentation](https://microbit-micropython.readthedocs.io/en/latest/index.html#)
 
-This is the collection of my notes, tricks and experiments on BBC micro:bit and MicroPython. This guide has bee upgraded for micro:bit V2 and may not be fully compatible for V1.
+This is the collection of my notes, tricks and experiments on BBC micro:bit and MicroPython. This guide has bee upgraded for micro:bit V2; most of them are compatible with V1 but there would be limitations.
 
 ## Something About micro:bit's MicroPython
 
@@ -384,7 +384,7 @@ def rainbow_cycle():
         np[i] = wheel(rc_index & 255)
     np.show()
     sleep(led_delay)
-    cycle = (cycle + 1) if cycle < 255 else 0
+    cycle = (cycle + 1) & 255
 
 
 cycle = 0