diff --git a/usb/pulse-leds.js b/usb/pulse-leds.js
new file mode 100755
index 00000000..038a47f4
--- /dev/null
+++ b/usb/pulse-leds.js
@@ -0,0 +1,78 @@
+#!/usr/bin/env node
+'use strict';
+
+var usb = require('usb');
+var util = require('./util');
+
+var vid = 0x16d3;
+var pid = 0x05ea;
+var ledMatrixSize = 144;
+var ledCountToUpdatePerCommand = ledMatrixSize / 3;
+var writeLedDriverCommandId = 3;
+var leftLedDriverAddress = 0b1110100;
+var rightLedDriverAddress = 0b1110111;
+
+var device = usb.findByIds(vid, pid);
+device.open();
+
+var usbInterface = device.interface(0);
+if (usbInterface.isKernelDriverActive()) {
+    usbInterface.detachKernelDriver();
+}
+usbInterface.claim();
+
+var endpointIn = usbInterface.endpoints[0];
+var endpointOut = usbInterface.endpoints[1];
+
+var state = 1;
+
+var ledsLeft = new Buffer(ledMatrixSize);
+var ledsRight = new Buffer(ledMatrixSize);
+
+var ledIndex = 0;
+var matrixId = 0;
+
+function updateLeds() {
+    console.log('update')
+    endpointOut.transfer(Buffer.concat([
+        new Buffer([
+            writeLedDriverCommandId,
+            matrixId ? rightLedDriverAddress : leftLedDriverAddress,
+            ledCountToUpdatePerCommand,
+            0x24 + ledIndex
+        ]),
+        (matrixId ? ledsRight : ledsLeft).slice(ledIndex, ledCountToUpdatePerCommand)
+    ]), function(err) {
+        if (err) {
+            console.error("USB error: %s", err);
+            process.exit(1);
+        }
+        console.log('update success')
+        endpointIn.transfer(64, function(err2, receivedBuffer) {
+            if (err2) {
+                console.error("USB error: %s", err2);
+                process.exit(2);
+            }
+            console.log('Received', util.bufferToString(receivedBuffer));
+
+            ledIndex += ledCountToUpdatePerCommand;
+            if (ledIndex >= ledMatrixSize) {
+                ledIndex = 0;
+            }
+            matrixId = matrixId ? 0 : 1;
+
+            updateLeds();
+        })
+    });
+}
+
+updateLeds();
+var i = 0;
+setInterval(function() {
+    console.log('iter')
+    ledsLeft.fill(0)
+    ledsLeft[i] = 0xff;
+    if (++i >= ledMatrixSize) {
+        i = 0;
+    }
+}, 100)