diff --git a/lights.js b/lights.js
index 9f37dfd..bf5ba0b 100644
--- a/lights.js
+++ b/lights.js
@@ -23,7 +23,7 @@ function tick_pattern() {
   var g = Math.floor(Math.random() * 100);
   var b = Math.floor(Math.random() * 100);
 
-  for (int i = 0; i < global.cfg.leds; i++) {
+  for (let i = 0; i < global.cfg.leds; i++) {
     if (i % 3 == 0) {
       next_pattern[i] = r;
       next_pattern[i + 1] = g;
@@ -34,7 +34,7 @@ function tick_pattern() {
 
 export function tick() {
   var changed = false;
-  for (int i = 0; i < global.cfg.leds; i++) {
+  for (let i = 0; i < global.cfg.leds; i++) {
     if (next_pattern[i] != pixels[i]) {
       changed = true;
       fade(i);