diff --git a/README.md b/README.md
index 5b0d11d..610e36b 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ A C++ library for event-driven asynchronous multi-threaded programming.
 - Event loops
 - Multiple parallel execution loops
 - Asynchronous file IO
+- Based on ASIO (Boost Asio)
 ## Installation
 
 Just download the latest release and unzip it into your project. 
@@ -24,14 +25,17 @@ Just download the latest release and unzip it into your project.
 
 #include "asynco/lib/asynco.hpp"          // atask(), wait()
 #include "asynco/lib/event.hpp"          // event
-#include "asynco/lib/rotor.hpp"          // interval, timeout
-#include "asynco/lib/runner.hpp"         // for own loop
+#include "asynco/lib/timers.hpp"          // interval, timeout
 #include "asynco/lib/filesystem.hpp"     // for async read and write files
 
 using namespace marcelb;
 using namespace asynco;
 using namespace events;
 
+// At the end of the main function, always set
+_asynco_engine.run();
+return 0;
+
 ```
 
 ## Usage
@@ -45,7 +49,13 @@ interval inter1 ([]() {
 }, 1000);
 
 // stop interval
-inter1.clear();
+inter1.stop();
+
+// how many times it has expired
+int t = inter1.ticks();
+
+// is it stopped
+bool stoped = inter1.stoped();
 
 // start timeout
 timeout time1 ( [] () {
@@ -53,7 +63,14 @@ timeout time1 ( [] () {
 }, 10000);
 
 // stop timeout
-time1.clear();
+time1.stop();
+
+// is it expired
+int t = time1.expired();
+
+// is it stopped
+bool stoped = time1.stoped();
+
 ```
 Make functions asynchronous
 
diff --git a/lib/asynco.hpp b/lib/asynco.hpp
index afd99c6..9104f27 100644
--- a/lib/asynco.hpp
+++ b/lib/asynco.hpp
@@ -1,21 +1,67 @@
 #ifndef _ASYNCO_
 #define _ASYNCO_
 
-#include "runner.hpp"
+#include <boost/asio.hpp>
+#include <iostream>
 
 using namespace std;
 
 namespace marcelb {
 namespace asynco {
 
+#define HW_CONCURRENCY_MINIMAL 4
+
+
+/**
+ * Internal anonymous class for initializing the ASIO context and thread pool
+ * !!! It is anonymous to protect against use in the initialization of other objects of the same type !!!
+*/
+class {
+    public:
+    boost::asio::io_context io_context;
+
+    void run() {
+        for (auto& runner : runners) {
+            runner.join();
+        }
+    }
+    
+    private:
+
+    unique_ptr<boost::asio::io_service::work> work { [&] () {
+        return new boost::asio::io_service::work(io_context);
+    } ()};
+
+    vector<thread> runners { [&] () {
+        vector<thread> _runs;
+        unsigned int num_of_runners;
+        #ifdef NUM_OF_RUNNERS
+            num_of_runners = NUM_OF_RUNNERS;
+        #else
+            num_of_runners = thread::hardware_concurrency();
+            if (num_of_runners < HW_CONCURRENCY_MINIMAL) {
+                num_of_runners = HW_CONCURRENCY_MINIMAL;
+            }
+        #endif
+
+        for (int i=0; i<num_of_runners; i++) {
+            _runs.push_back(thread ( [this] () {
+                io_context.run();
+            }));
+        }
+
+        return _runs;
+    } ()};
+
+} _asynco_engine;
+
 /**
  * Run the function asynchronously
 */
 template<class F, class... Args>
 auto atask(F&& f, Args&&... args) -> future<typename result_of<F(Args...)>::type> {
     using return_type = typename result_of<F(Args...)>::type;
-
-    future<return_type> res = _asyncon.put_task(bind(forward<F>(f), forward<Args>(args)...));
+    future<return_type> res = _asynco_engine.io_context.post(boost::asio::use_future(bind(forward<F>(f), forward<Args>(args)...)));
     return res;
 }
 
diff --git a/lib/event.hpp b/lib/event.hpp
index cb70873..a7593be 100644
--- a/lib/event.hpp
+++ b/lib/event.hpp
@@ -1,15 +1,14 @@
 #ifndef _EVENT_
 #define _EVENT_
 
-#include <iostream>
 #include <map>
 #include <vector>
 #include <string>
 #include <functional>
-#include "runner.hpp"
 
 using namespace std;
 
+#include "asynco.hpp"
 namespace marcelb {
 namespace asynco {
 namespace events {
@@ -43,7 +42,7 @@ class event {
         if (it_eve != events.end()) {
             for (uint i =0; i<it_eve->second.size(); i++) {
                 auto callback = bind(it_eve->second[i], forward<Args>(args)...); 
-                _asyncon.put_task(callback);
+                atask(callback);
             }
         }
     }
diff --git a/lib/filesystem.hpp b/lib/filesystem.hpp
index bd9faeb..18dbb0a 100644
--- a/lib/filesystem.hpp
+++ b/lib/filesystem.hpp
@@ -3,13 +3,12 @@
 
 #include "asynco.hpp"
 
+using namespace marcelb;
+using namespace asynco;
 
 #include <fstream>
-#include <iostream>
-
 using namespace std;
-using namespace marcelb;
-using namespace asynco;
+
 
 namespace marcelb {
 namespace asynco {
diff --git a/lib/runner.hpp b/lib/runner.hpp
deleted file mode 100644
index 387bd65..0000000
--- a/lib/runner.hpp
+++ /dev/null
@@ -1,136 +0,0 @@
-#ifndef _RUNNER_
-#define _RUNNER_
-
-#include <thread>
-#include <vector>
-#include <queue>
-#include <functional>
-#include <mutex>
-#include <condition_variable>
-#include <future>
-
-using namespace std;
-
-namespace marcelb {
-namespace asynco {
-
-#define HW_CONCURRENCY_MINIMAL 4
-
-/**
- * The runner class implements multithread, task stack and event loop for asynchronous execution of tasks
-*/
-class runner {
-    private:
-    vector<thread> runners;
-    queue<function<void()>> tasks;
-    mutex q_io;
-    condition_variable cv;
-    bool stop;
-
-    public:
-
-    /**
-     * The constructor starts as many threads as the system has cores, 
-     * and runs an event loop inside each one. 
-     * Each event loop waits for tasks from the stack and executes them.
-    */
-    runner(unsigned int _num_of_runners = 0) : stop(false) {
-        unsigned int num_of_runners = _num_of_runners;
-
-        if (num_of_runners == 0) {
-            #ifdef NUM_OF_RUNNERS
-                num_of_runners = NUM_OF_RUNNERS;
-            #else
-                num_of_runners = thread::hardware_concurrency();
-                if (num_of_runners < HW_CONCURRENCY_MINIMAL) {
-                    num_of_runners = HW_CONCURRENCY_MINIMAL;
-                }
-            #endif
-        }
-
-        for (size_t i = 0; i < num_of_runners; ++i) {
-            runners.emplace_back( thread([&] {
-                while (!stop) {
-                    function<void()> task;
-                    {
-                        unique_lock<mutex> lock(q_io);
-                        cv.wait(lock, [this] { return stop || !tasks.empty(); });
-                        // if (stop && tasks.empty())
-                        if (stop)
-                            return;
-                        task = move(tasks.front());
-                        tasks.pop();
-                    }
-                    task();
-                }
-            }));
-        }
-    }
-
-    
-
-    /**
-     * With the method, we send the callback function and its arguments to the task stack
-    */
-    template<class F, class... Args>
-    auto put_task(F&& f, Args&&... args)
-        -> future<typename result_of<F(Args...)>::type> {
-        using return_type = typename result_of<F(Args...)>::type;
-
-        auto task = make_shared<packaged_task<return_type()>>(bind(forward<F>(f), forward<Args>(args)...));
-        future<return_type> res = task->get_future();
-        {
-            unique_lock<mutex> lock(q_io);
-
-            if (stop) {
-                throw runtime_error("Pool is stoped!");
-            }
-
-            tasks.emplace([task]() { (*task)(); });
-        }
-
-        cv.notify_one();
-        return res;
-    }
-
-    /**
-     * Returns the number of tasks the runner has to perform
-    */
-    unsigned int count_tasks() {
-        return tasks.size();
-    }
-
-    /**
-     * Returns the number of threads used by the runner
-    */
-    unsigned int count_threads() {
-        return runners.size();
-    }
-
-    /**
-     * The destructor stops all loops and stops all threads
-    */
-    ~runner() {
-        {
-            unique_lock<mutex> lock(q_io);
-            stop = true;
-        }
-        cv.notify_all();
-        for (thread& runner : runners) {
-            runner.join();
-        }
-        runners.clear();
-    }
-
-};
-
-
-/**
- * Internal global library variable
-*/
-static runner _asyncon;
-
-}
-}
-
-#endif
\ No newline at end of file
diff --git a/lib/timers.hpp b/lib/timers.hpp
new file mode 100644
index 0000000..b4befdd
--- /dev/null
+++ b/lib/timers.hpp
@@ -0,0 +1,223 @@
+#ifndef _ROTOR_
+#define _ROTOT_
+
+#include "asynco.hpp"
+#include <chrono>
+
+using namespace std;
+using namespace marcelb;
+using namespace asynco;
+
+namespace marcelb {
+namespace asynco {
+
+/**
+ * Get the time in ms from the epoch
+*/
+
+int64_t rtime_ms() {
+    return chrono::duration_cast<chrono::milliseconds>(chrono::system_clock::now()
+        .time_since_epoch())
+        .count();
+}
+
+/**
+ * Get the time in us from the epoch
+*/
+
+int64_t rtime_us() {
+    return chrono::duration_cast<chrono::microseconds>(chrono::system_clock::now()
+        .time_since_epoch())
+        .count();
+}
+
+/**
+ * Core timer class for construct time async functions
+*/
+class timer {
+    boost::asio::steady_timer st;
+    bool _stop = false;
+    bool repeate;
+    function<void()> callback;
+    uint64_t time;
+    uint64_t _ticks = 0;
+
+    /**
+     * A method to assign a callback wrapper and a reinitialization algorithm
+    */
+    void init() {
+        st.async_wait( [this] (const boost::system::error_code&) {
+            if (!_stop) {
+                callback();
+                if (repeate) {
+                    st = boost::asio::steady_timer(_asynco_engine.io_context, boost::asio::chrono::milliseconds(time));
+                    init();
+                }
+                _ticks++;
+            }
+        });
+    }
+   
+    public:
+
+    /**
+     * The constructor creates the steady_timer and accompanying variables and runs a method to initialize the timer
+    */
+    timer (function<void()> _callback, uint64_t _time, bool _repeate) :
+        st(_asynco_engine.io_context, boost::asio::chrono::milliseconds(_time)),
+        _stop(false),
+        repeate(_repeate),
+        callback(_callback),
+        time(_time) {
+            
+        init();
+    }
+
+    /**
+     * Stop timer
+     * The stop flag is set and timer remove it from the queue
+    */
+    void stop() {
+        _stop = true;
+        st.cancel();
+    }
+    
+    /**
+     * Run callback now
+     * Forces the callback function to run independently of the timer
+    */
+    void now() {
+        st.cancel();
+    }
+
+    /**
+     * Get the number of times the timer callback was runned
+    */
+    uint64_t ticks() {
+        return _ticks;
+    }
+
+    /**
+     * The logic status of the timer stop state
+    */
+    bool stoped() {
+        return _stop;
+    }
+
+    /**
+     * The destructor stops the timer
+    */
+    ~timer() {
+        stop();
+    }
+};
+
+/**
+ * Class interval for periodic execution of the callback in time in ms
+*/
+class interval {
+    shared_ptr<timer> _timer;
+
+    public:
+    /**
+     * Constructor initializes a shared pointer of type timer
+    */
+    interval(function<void()> callback, uint64_t time) : 
+        _timer(make_shared<timer> (callback, time, true)) {
+    }
+
+    /**
+     * Stop interval
+     * The stop flag is set and interval remove it from the queue
+    */
+    void stop() {
+        _timer->stop();
+    }
+
+    /**
+     * Run callback now
+     * Forces the callback function to run independently of the interval
+    */
+    void now() {
+        _timer->now();
+    }
+    
+    /**
+     * Get the number of times the interval callback was runned
+    */
+    uint64_t ticks() {
+        return _timer->ticks();
+    }
+
+    /**
+     * The logic status of the interval stop state
+    */
+    bool stoped() {
+        return _timer->stoped();
+    }
+    
+    /**
+     * The destructor stops the interval
+    */
+    ~interval() {
+        stop();
+    }
+};
+
+/**
+ * Class timeout for delayed callback execution in ms
+*/
+class timeout {
+    shared_ptr<timer> _timer;
+
+    public:
+    /**
+     * Constructor initializes a shared pointer of type timer
+    */
+    timeout(function<void()> callback, uint64_t time) : 
+        _timer(make_shared<timer> (callback, time, false)) {
+    }
+    
+    /**
+     * Stop timeout
+     * The stop flag is set and timeout remove it from the queue
+    */
+    void stop() {
+        _timer->stop();
+    }
+
+    /**
+     * Run callback now
+     * Forces the callback function to run independently of the timeout
+    */
+    void now() {
+        _timer->now();
+    }
+
+    /**
+     * Get the number of times the timeout callback was runned
+    */
+    bool expired() {
+        return bool(_timer->ticks());
+    }
+
+    /**
+     * The logic status of the timeout stop state
+    */
+    bool stoped() {
+        return _timer->stoped();
+    }
+
+    /**
+     * The destructor stops the timeout
+    */
+    ~timeout() {
+        stop();
+    }
+
+};
+
+}
+}
+
+#endif
diff --git a/test/test.cpp b/test/test.cpp
index a1a427b..ed6c04c 100644
--- a/test/test.cpp
+++ b/test/test.cpp
@@ -1,19 +1,21 @@
-// #define NUM_OF_RUNNERS 2
+// // #define NUM_OF_RUNNERS 2
 
 #include "../lib/asynco.hpp"
 #include "../lib/event.hpp"
-#include "../lib/rotor.hpp"
 #include "../lib/filesystem.hpp"
+#include "../lib/timers.hpp"
+
+using namespace marcelb::asynco;
+using namespace events;
 
 #include <iostream>
 #include <unistd.h>
+#include <thread>
 
 using namespace std;
-using namespace marcelb::asynco;
-using namespace events;
-using namespace asynco;
 using namespace this_thread;
 
+
 void sleep_to (int _time) {
     promise<void> _promise;
     timeout t( [&]() {
@@ -63,38 +65,9 @@ int main () {
 
     // --------------- TIME ASYNCHRONOUS FUNCTIONS --------------
 
-    /**
-     * Init interval and timeout; clear interval and timeout
-    */
-
-    vector<interval> intervals;
-
-    for(int i=0; i<10; i++) {
-        intervals.push_back(interval( [i, &start]() {
-            cout << "interval " << i << " end: "  << rtime_ms() - start << endl;
-        }, (i%5 +1)*1000));
-    }
-
-    // interval( [&] () {
-    //     cout << "interval 1: "  << rtime_ms() - start << endl;
-    // }, 50);
-
-    // interval( [&] () {
-    //     cout << "interval 1: "  << rtime_ms() - start << endl;
-    // }, 100);
-
-    // interval( [&] () {
-    //     cout << "interval 2: " << rtime_ms() - start << endl;
-    // }, 200);
-
-    // interval( [&] () {
-    //     cout << "interval 3: " << rtime_ms() - start << endl;
-    // }, 300);
-
-
-    // interval( [&] () {
-    //     cout << "interval 4: "  << rtime_ms() - start << endl;
-    // }, 400);
+    // /**
+    //  * Init interval and timeout; clear interval and timeout
+    // */
 
     // interval inter1 ([&]() {
     //     cout << "interval prvi " << rtime_ms() - start << endl;
@@ -106,11 +79,12 @@ int main () {
 
     // interval inter3 ([&]() {
     //     cout << "interval treći " << rtime_ms() - start << endl;
-    // }, 3000);
+    // }, 1000);
 
     // interval inter4 ([&]() {
-    //     cout << "interval cetvrti " << rtime_ms() - start << endl;
-    // }, 1000);
+    //     // cout << "interval cetvrti " << rtime_ms() - start << endl;
+    //     cout << "Ticks " << inter3.ticks() << endl;
+    // }, 500);
 
     // interval inter5 ([&]() {
     //     cout << "interval peti " << rtime_ms() - start << endl;
@@ -122,18 +96,34 @@ int main () {
 
     // timeout time1 ( [&] () {
     //     cout << "Close interval 1 i 2 " << rtime_ms() - start << endl;
-    //     // inter1.clear();
-    //     // cout << "inter1.stop " << inter1.stop << endl;
-    //     // inter2.clear();
-    //     // cout << "inter2.stop " << inter2.stop << endl;
-    // }, 5000);
+    //     inter1.stop();
+    //     cout << "inter1.stop " << endl;
+    //     inter2.stop();
+    //     cout << "inter2.stop " << endl;
+    // }, 8000);
 
 
     // timeout time2 ([&] () {
     //     cout << "Close interval 3 " << rtime_ms() - start << endl;
-    //     // inter3.clear();
-    //     time1.clear();
-    // }, 2000);
+    //     inter3.stop();
+    //     cout << "Stoped " << inter3.stoped() << endl;
+    //     // time1.stop();
+    // }, 5000);
+
+
+    // if (time2.expired()) {
+    //     cout << "isteko " << endl;
+    // } else {
+    //     cout << "nije isteko " << endl;
+    // }
+
+    // // sleep(6);
+
+    // if (time2.expired()) {
+    //     cout << "isteko " << endl;
+    // } else {
+    //     cout << "nije isteko " << endl;
+    // }
 
     // // // ------------------------ MAKE FUNCTIONS ASYNCHRONOUS -------------------------
 
@@ -226,7 +216,7 @@ int main () {
     //     });
     // });
 
-    // // --------------- EVENTS -------------------
+    // // // --------------- EVENTS -------------------
 
     // /**
     //  * initialization of typed events
@@ -301,8 +291,26 @@ int main () {
     //     cout << err.what() << endl;
     // }
 
-    cout << "Sleep" << endl;
-    sleep(100000); // only for testing
+
+    // string data_;
+    // auto start_read = rtime_us();
+
+    // fs::read("test1.txt", [&data_, &start_read] (string data, exception* error) {
+    //     if (error) {
+    //         cout << "Error " << error->what() << endl;
+    //     } else {
+    //         // cout << "Data " << endl << data << endl;
+    //         // data_ = data;
+    //         // cout << "Data_" << data_ << endl;
+    //         cout << "read " << rtime_us() - start_read << endl;
+    //     }
+    // });
+
+
+    // ----------------------------------------------------------------------------------------------------
+
+    cout << "Run" << endl;
+    _asynco_engine.run();
 
     return 0;
 }