diff --git a/simulation/src/de/c3ma/ollo/mockup/ESP8266Time.java b/simulation/src/de/c3ma/ollo/mockup/ESP8266Time.java
index e8f5446..16e442c 100644
--- a/simulation/src/de/c3ma/ollo/mockup/ESP8266Time.java
+++ b/simulation/src/de/c3ma/ollo/mockup/ESP8266Time.java
@@ -1,18 +1,12 @@
 package de.c3ma.ollo.mockup;
 
-import org.luaj.vm2.Globals;
 import org.luaj.vm2.LuaFunction;
 import org.luaj.vm2.LuaTable;
 import org.luaj.vm2.LuaValue;
-import org.luaj.vm2.Varargs;
-import org.luaj.vm2.lib.OneArgFunction;
 import org.luaj.vm2.lib.ThreeArgFunction;
 import org.luaj.vm2.lib.TwoArgFunction;
-import org.luaj.vm2.lib.VarArgFunction;
 import org.luaj.vm2.lib.ZeroArgFunction;
 
-import de.c3ma.ollo.LuaThreadTmr;
-
 /**
  * created at 29.12.2017 - 00:07:22<br />
  * creator: ollo<br />
@@ -27,6 +21,8 @@ import de.c3ma.ollo.LuaThreadTmr;
  */
 public class ESP8266Time extends TwoArgFunction {
     
+    private static long gSimulationStartTime = 0;
+    
     @Override
     public LuaValue call(LuaValue modname, LuaValue env) {
         env.checkglobals();
@@ -42,6 +38,23 @@ public class ESP8266Time extends TwoArgFunction {
         return sntp;
     }
 
+    /**
+     * Generate a time. If there is no speedup, it is simply the current system time.
+     * Otherwise the time is speedup by the given factor
+     * @return
+     */
+    private long generateCurrenttime() {
+        if (gSimulationStartTime == 0) {
+            gSimulationStartTime = System.currentTimeMillis();
+        }
+        
+        long time = System.currentTimeMillis();
+        if (ESP8266Tmr.gTimingFactor > 1) {
+            time = gSimulationStartTime + ((time - gSimulationStartTime) * ESP8266Tmr.gTimingFactor);
+        }
+        return time;
+    }
+
     private class SyncFunction extends ThreeArgFunction {
 
         @Override
@@ -49,12 +62,11 @@ public class ESP8266Time extends TwoArgFunction {
             String serverName = server.checkjstring();
             LuaFunction cb = callbackSuccess.checkfunction();
             System.out.println("[SNTP] sync " + serverName);
-            
             /*FIXME also make it possible to simulate the time */
-            int seconds = (int) (System.currentTimeMillis() / 1000);
-            int useconds = (int) (System.currentTimeMillis() % 1000);
+            long time = generateCurrenttime();
+            int seconds = (int) (time / 1000);
+            int useconds = (int) (time % 1000);
             cb.call(LuaValue.valueOf(seconds), LuaValue.valueOf(useconds), LuaValue.valueOf(serverName));
-            
             return LuaValue.valueOf(true);
         }
         
@@ -64,10 +76,11 @@ public class ESP8266Time extends TwoArgFunction {
 
         @Override
         public LuaValue call() {
-            LuaValue[] v = new LuaValue[2];
+            LuaValue[] v = new LuaValue[2];            
             /*FIXME also make it possible to simulate the time */
-            int seconds = (int) (System.currentTimeMillis() / 1000);
-            int useconds = (int) (System.currentTimeMillis() % 1000);
+            long time = generateCurrenttime();
+            int seconds = (int) (time / 1000);
+            int useconds = (int) (time % 1000);
             v[0] = LuaValue.valueOf(seconds);
             v[1] = LuaValue.valueOf(useconds);
             return LuaValue.varargsOf(v).arg1();
diff --git a/simulation/src/de/c3ma/ollo/mockup/ui/WS2812Layout.java b/simulation/src/de/c3ma/ollo/mockup/ui/WS2812Layout.java
index de630b4..bcf22c3 100644
--- a/simulation/src/de/c3ma/ollo/mockup/ui/WS2812Layout.java
+++ b/simulation/src/de/c3ma/ollo/mockup/ui/WS2812Layout.java
@@ -82,6 +82,7 @@ public class WS2812Layout extends JFrame {
 		contentPane.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 2));
 
 		JPanel ledPanel = new JPanel();
+		ledPanel.setBackground(Color.BLACK);
 		ledPanel.setLayout(new GridLayout(this.mRow, this.mColumn, 10, 10));
 		for (int i = 0; i < this.mRow; i++) {
 			for (int j = 0; j < this.mColumn; j++) {
@@ -159,9 +160,7 @@ public class WS2812Layout extends JFrame {
 
 		public void setColor(int red, int green, int blue) {
 			this.setForeground(new Color(red, green, blue));
-			// FIXME changing the color is not working
 			this.repaint();
-			System.out.println(this.toString());
 		}
 
 		@Override