diff --git a/lights.js b/lights.js
index 8dfd66d..82fcf98 100644
--- a/lights.js
+++ b/lights.js
@@ -48,13 +48,17 @@ export function tick() {
     if (next_pattern[i] != pixels[i]) {
       if (next_pattern[i] == pixel_cache[i]) {
         console.log("INCONGRUENCE WITH " + i);
-        pixels[i] = next_pattern[i]
+        pixels[i] = next_pattern[i];
       }
       else {
         changed = true;
         fade(i);
       }
     }
+    else if (pixel_cache[i] != next_pattern[i]) {
+      console.log("PATTERN NOT STORED " + i);
+      pixel_cache[i] = next_pattern[i];
+    }
   }
   if (!changed) {
     tick_pattern();