diff --git a/demo.js b/demo.js
index d529200..a8826e1 100644
--- a/demo.js
+++ b/demo.js
@@ -6,6 +6,7 @@ var A = DMX.Animation
 var dmx = new DMX()
 
 // var universe = dmx.addUniverse('demo', 'enttec-usb-dmx-pro', 0)
+// var universe = dmx.addUniverse('demo', 'enttec-open-usb-dmx', 0)
 var universe = dmx.addUniverse('demo', 'null')
 
 universe.update({0: 1, 1: 0})
diff --git a/demo_simple.js b/demo_simple.js
new file mode 100644
index 0000000..4a31edd
--- /dev/null
+++ b/demo_simple.js
@@ -0,0 +1,21 @@
+"use strict"
+
+var DMX = require('./dmx');
+var A = DMX.Animation;
+
+var dmx = new DMX();
+// var universe = dmx.addUniverse('demo', 'enttec-open-usb-dmx', 0)
+var universe = dmx.addUniverse('demo', 'null')
+
+var on = false;
+setInterval(function(){
+  if(on){
+    on = false;
+    universe.updateAll(0);
+    console.log("off");
+  }else{
+    on = true;
+    universe.updateAll(250);
+    console.log("on");
+  }
+}, 1000);
\ No newline at end of file
diff --git a/dmx.js b/dmx.js
index 235549f..4072f65 100644
--- a/dmx.js
+++ b/dmx.js
@@ -30,4 +30,9 @@ DMX.prototype.update = function(universe, channels) {
 	this.emit('update', universe, channels)
 }
 
+DMX.prototype.updateAll = function(universe, value) {
+  this.universes[universe].updateAll(value)
+  this.emit('updateAll', universe, value)
+}
+
 module.exports = DMX
diff --git a/drivers/enttec-open-usb-dmx.js b/drivers/enttec-open-usb-dmx.js
index 30b91e9..4e59985 100644
--- a/drivers/enttec-open-usb-dmx.js
+++ b/drivers/enttec-open-usb-dmx.js
@@ -2,23 +2,23 @@
 
 var FTDI = require('ftdi')
 
-function EnttecOpenUsbDMX(device_id, cb) {
+function EnttecOpenUsbDMX(locationId, cb) {
   var self = this;
 
   cb = cb || function() {}
-  self.universe = new Buffer(513);
-  self.universe.fill(0);
-  self.sleepTime = 20; 
+  self.universe = Array(513);
+  self.universe[0] = 0;
+  self.updateAll(0);
+  self.sleepTime = 24; 
   self.timeout;
-  
-  self.dev = new FTDI.FtdiDevice(device_id)
+  self.dev = new FTDI.FtdiDevice(locationId)
   self.dev.open({
     'baudrate': 115200 / 2,
     'databits': 8,
     'stopbits': 2,
     'parity': 'none'
   }, function(err) {
-    cb(err, device_id)
+    cb(err, locationId)
     if(!err) {
       self.loopUniverse()
     }
@@ -27,18 +27,25 @@ function EnttecOpenUsbDMX(device_id, cb) {
 
 EnttecOpenUsbDMX.prototype.loopUniverse = function(){
   var self = this;
+  clearTimeout(self.timeout);
 
   self.dev.write(self.universe);
+
   self.timeout = setTimeout(function(){
     self.loopUniverse();
   }, self.sleepTime)
 }
 
 EnttecOpenUsbDMX.prototype.pause = function(){
+  var self = this;
+
   clearTimeout(self.timeout);
 }
 
 EnttecOpenUsbDMX.prototype.close = function(cb){
+  var self = this;
+
+  self.pause();
   self.dev.close(function(err){
     cb(err)
   })
@@ -48,7 +55,17 @@ EnttecOpenUsbDMX.prototype.update = function(u) {
   var self = this;
 
   for(var c in u) {
-    self.universe[(c + 1)] = u[self.toHex(c)];
+    self.universe[(c + 1)] = u[c];
+  }
+}
+
+EnttecOpenUsbDMX.prototype.updateAll = function(v) {
+  var self = this;
+
+  var i = 1;
+  while(i < self.universe.length){
+    self.universe[i] = v;
+    i++;
   }
 }
 
@@ -58,13 +75,4 @@ EnttecOpenUsbDMX.prototype.get = function(c) {
   return self.universe[(c + 1)];
 }
 
-EnttecOpenUsbDMX.prototype.toHex = function(number){
-  var self = this;
-
-  var octet =  parseInt(number).toString(16);
-  if(octet.length == 1){ octet = "0" + octet; }
-  var fullOctet = "0x" + octet;
-  return eval(fullOctet); // TODO: dangerous! 
-}
-
 module.exports = EnttecOpenUsbDMX
diff --git a/drivers/enttec-usb-dmx-pro.js b/drivers/enttec-usb-dmx-pro.js
index 514f1dc..b13d2bd 100644
--- a/drivers/enttec-usb-dmx-pro.js
+++ b/drivers/enttec-usb-dmx-pro.js
@@ -53,6 +53,10 @@ EnttecUSBDMXPRO.prototype.update = function(u) {
 	this.send_universe()
 }
 
+EnttecUSBDMXPRO.prototype.updateAll = function(v){
+  // TODO
+}
+
 EnttecUSBDMXPRO.prototype.get = function(c) {
 	return this.universe[c]
 }
diff --git a/drivers/null.js b/drivers/null.js
index c63e4f3..8259b6b 100644
--- a/drivers/null.js
+++ b/drivers/null.js
@@ -14,6 +14,10 @@ Null.prototype.update = function(u) {
 	console.log(this.universe)
 }
 
+Null.prototype.updateAll = function(v){
+  // TODO
+}
+
 Null.prototype.get = function(c) {
 	return this.universe[c]
 }