diff --git a/sensehat.js b/sensehat.js
index 8d8cf8b..a6d7956 100644
--- a/sensehat.js
+++ b/sensehat.js
@@ -37,16 +37,16 @@ io.on('connection', (client) => {
             case 'hello':
                 sense.flashMessage('HELLO', 1, blue)
                 sense.clear()
-                read_all_leds(true)
+                read_all_leds(0)
                 break
             case 'flash':
                 sense.clear([255, 255, 255])
                 setTimeout(sense.clear, 100)
-                read_all_leds(true)
+                read_all_leds(0)
                 break
             case 'clear':
                 sense.clear()
-                read_all_leds(true)
+                read_all_leds(0)
                 break
             case 'temp':
                 read_all_leds()
@@ -58,11 +58,11 @@ io.on('connection', (client) => {
     })
 })
 
-function read_all_leds(zero = false) {
+function read_all_leds(value = null) {
     const pixels = sense.getPixels()
     for (let y = 0; y < 8; y++) {
         for (let x = 0; x < 8; x++) {
-            leds[y][x] = zero || sense.getPixel(x, y)[2] == 0 ? 0 : 1
+            leds[y][x] = value !== null ? value : sense.getPixel(x, y)[2] == 0 ? 0 : 1
         }
     }
 }