Name file more aptly because both LEDs get toggled.

usb/blink-test-leds.js

@@ -0,0 +1,15 @@
+#!/usr/bin/env node
+let uhk = require('./uhk');
+
+let delayCycle = true;
+let areLedsEnabled = true;
+
+uhk.sendUsbPacketsByCallback(() => {
+    delayCycle = !delayCycle;
+    if (delayCycle) {
+        return new uhk.DelayMs(500);
+    } else {
+        areLedsEnabled = !areLedsEnabled;
+        return new Buffer([uhk.usbCommands.setTestLed, areLedsEnabled ? 1 : 0]);
+    }
+});