From 724e334c266d82b7ca0b74b4cddae7054bb8363a Mon Sep 17 00:00:00 2001
From: Jane Petrovna <jane@j4.pm>
Date: Fri, 4 Jun 2021 22:21:54 -0400
Subject: [PATCH] add null check

---
 lights.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lights.js b/lights.js
index 0d5a7c6..8cbaa9b 100644
--- a/lights.js
+++ b/lights.js
@@ -99,7 +99,7 @@ function tick_pattern() {
 
   let parsed = pattern.parsed;
 
-  if (parsed.length > 0) {
+  if (parsed && parsed.length > 0) {
     for (let i = 0; i < cfg.leds; i++) {
       for (let id in parsed) {
         let command = parsed[id];