diff --git a/src/opensesim/util/scheduler/Clock.java b/src/opensesim/util/scheduler/Clock.java
new file mode 100644
index 0000000..f3801f4
--- /dev/null
+++ b/src/opensesim/util/scheduler/Clock.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2018, 7u83
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package opensesim.util.scheduler;
+
+/**
+ *
+ * @author 7u83 <7u83@mail.ru>
+ */
+public class Clock {
+
+    private double current_millis;
+    private long last_nanos;
+    private double current_nanos;
+    private double acceleration;
+
+    public double getAcceleration() {
+        return acceleration;
+    }
+
+    public void setAcceleration(double acceleration) {
+        synchronized (this) {
+            this.acceleration = acceleration;
+            this.notifyAll();
+        }
+    }
+    private boolean pause = false;
+
+    public boolean isPause() {
+        return pause;
+    }
+
+    public void setPause(boolean pause) {
+        this.pause = pause;
+    }
+
+    Clock() {
+        this.acceleration = 1.0;
+        this.current_nanos = 0;
+        this.current_millis = 0.0;
+        this.last_nanos = System.nanoTime();
+
+    }
+
+    private long currentTimeMillis1() {
+
+        long nanos = System.nanoTime();
+        long diff = nanos - last_nanos;
+        last_nanos = nanos;
+
+        if (pause) {
+            return (long) this.current_millis;
+        }
+
+        this.current_nanos += (double) diff * (double) this.acceleration;
+        this.current_millis = this.current_nanos / 1000000.0;
+
+        return (long) this.current_millis;
+    }
+
+    public long currentTimeMillis() {
+        return (long) this.current_millis;
+    }
+
+    synchronized long getDelay(long t) {
+        long current = currentTimeMillis1();
+
+        if (t > current) {
+            return (long) (((double) t - this.current_millis) / this.acceleration);
+        }
+
+        /*     if (t < ct) {
+            //  System.out.printf("Time is overslipping: %d\n",ct-t);
+            this.current_millis = t;
+            this.current_nanos = this.current_millis * 1000000.0;
+
+        }*/
+        return 0;
+    }
+
+}
diff --git a/src/opensesim/util/scheduler/Event.java b/src/opensesim/util/scheduler/Event.java
new file mode 100644
index 0000000..a5a524a
--- /dev/null
+++ b/src/opensesim/util/scheduler/Event.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2018, tube
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package opensesim.util.scheduler;
+
+/**
+ *
+ * @author tube
+ */
+public abstract class Event {
+    
+}
diff --git a/src/opensesim/util/scheduler/EventListener.java b/src/opensesim/util/scheduler/EventListener.java
new file mode 100644
index 0000000..040577b
--- /dev/null
+++ b/src/opensesim/util/scheduler/EventListener.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2018, 7u83 <7u83@mail.ru>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package opensesim.util.scheduler;
+
+/**
+ *
+ * @author 7u83 <7u83@mail.ru>
+ */
+public interface EventListener {
+
+    long receive(Event task);
+   
+}
diff --git a/src/opensesim/util/scheduler/FiringEvent.java b/src/opensesim/util/scheduler/FiringEvent.java
new file mode 100644
index 0000000..2fe41d3
--- /dev/null
+++ b/src/opensesim/util/scheduler/FiringEvent.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2018, 7u83 <7u83@mail.ru>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package opensesim.util.scheduler;
+
+
+/**
+ *
+ * @author 7u83 <7u83@mail.ru>
+ */
+    public class FiringEvent extends Event {
+
+        EventListener listener;
+       
+        public FiringEvent(EventListener listener) {
+            this.listener = listener;
+        }
+        
+        public void fire(){
+            listener.receive(this);
+        }
+
+    }
\ No newline at end of file
diff --git a/src/opensesim/util/scheduler/Scheduler.java b/src/opensesim/util/scheduler/Scheduler.java
new file mode 100644
index 0000000..f53a289
--- /dev/null
+++ b/src/opensesim/util/scheduler/Scheduler.java
@@ -0,0 +1,163 @@
+/*
+ * Copyright (c) 2018, 7u83
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package opensesim.util.scheduler;
+
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.SortedMap;
+import java.util.TreeMap;
+import opensesim.util.scheduler.EventListener;
+
+/**
+ *
+ * @author tohe
+ */
+public class Scheduler {
+
+    private final SortedMap<Long, LinkedList<FiringEvent>> event_queue = new TreeMap<>();
+
+    private class Worker extends Thread {
+
+        boolean terminate = false;
+
+        @Override
+        public void run() {
+            while (!terminate) {
+
+                long delay = getDelay();
+//System.out.printf("Worker %d has delay %d\n",Thread.currentThread().getId(), delay);                
+                if (delay > 0  || delay==-1) {
+                    //System.out.printf("Worker %d sleeps for %d\n",Thread.currentThread().getId(), delay);
+                    synchronized (clock) {
+                        try {
+                            if (delay != -1 && !clock.isPause()) {
+                                clock.wait(delay);
+                            } else {
+                                clock.wait();
+                            }
+                        } catch (InterruptedException e) {
+//System.out.printf("Interrupted\n");
+                        }
+                    }
+                    continue;
+                }
+                FiringEvent e = getNextEvent();
+                
+                if (e == null) {
+                    continue;
+                }
+//System.out.printf("Worker %d got event %d\n",Thread.currentThread().getId(), e.t);
+                e.listener.receive(e);
+            }
+        }
+    }
+
+    ArrayList<Worker> workers;
+    final private Clock clock = new Clock();
+ //   int next = 0;
+
+    public Scheduler(int nthreads) {
+        workers = new ArrayList<>();
+        for (int i = 0; i < nthreads; i++) {
+            workers.add(i, new Worker());
+        }
+    }
+
+    public Scheduler() {
+        this(10);
+    }
+
+    public void start() {
+        for (Worker w : workers) {
+            w.start();
+        }
+    }
+
+    public FiringEvent startTimerTask(EventListener listener, long time) {
+        FiringEvent e = new FiringEvent(listener);
+        long t = time + clock.currentTimeMillis();
+        synchronized (event_queue) {
+            LinkedList<FiringEvent> s = event_queue.get(t);
+            if (s == null) {
+                s = new LinkedList<>();
+                event_queue.put(t, s);
+            }
+
+            s.add(e);
+        }
+        synchronized (clock) {
+            clock.notifyAll();
+        }
+        return e;
+
+    }
+
+    protected long getDelay() {
+        synchronized (event_queue) {
+            
+
+            if (event_queue.isEmpty()) {
+                return -1;
+            }
+
+            long t = event_queue.firstKey();
+//System.out.printf("Worker: %d - queu is not empty: cur millis %d til %d\n", Thread.currentThread().getId(), clock.currentTimeMillis(),t);
+            return clock.getDelay(t);
+        }
+    }
+
+    protected FiringEvent getNextEvent() {
+
+        //  System.out.printf("RunEvents in Thread %d\n",Thread.currentThread().getId());
+        synchronized (event_queue) {
+            if (event_queue.isEmpty()) {
+                return null;
+            }
+
+            long t = event_queue.firstKey();
+            LinkedList<FiringEvent> s = event_queue.get(t);
+
+            FiringEvent e = s.pop();
+            if (s.isEmpty()) {
+                event_queue.remove(t);
+            }
+
+            return e;
+
+        }
+
+    }
+
+    public long currentTimeMillis(){
+        return clock.currentTimeMillis();
+    }
+    
+    public void setAcceleration(double a){
+        clock.setAcceleration(a);
+        
+    }
+    
+}