diff --git a/scheduler.py b/scheduler.py
new file mode 100644
index 0000000..50b7f39
--- /dev/null
+++ b/scheduler.py
@@ -0,0 +1,132 @@
+import threading
+import time
+import random
+
+class CurrentlyComputing(Exception):
+    pass
+
+class SuccessfulOperation(Exception):
+    pass
+
+class FailedOperation(Exception):
+    pass
+
+
+class LocalThread(threading.Thread):
+
+    def __init__(self, id, address, orientation, transitions):
+
+        threading.Thread.__init__(self)
+
+        self.id = id
+        self.address = address
+        self.orientation = orientation
+        self.transitions = transitions
+        self.returncode = CurrentlyComputing()
+
+    def run(self):
+        print("Thread local n°{} parle depuis {} !".format(self.id, self.address))
+        self.returncode = SuccessfulOperation()
+        time.sleep(random.randint(0,3))
+        pass
+
+
+"""
+a = LocalThread()
+
+Si je lance a.run()
+
+0)  a est un LocalThread. Python charge donc la liste des fonctions de LocalThread
+
+1) on demande la fonction run() de LocalThread
+
+2) L'instance concernée est a, on lance donc run(a)
+"""
+
+class User:
+
+    stop = False
+
+
+class GreatScheduler(threading.Thread):
+
+    def __init__(self, preemption_space, arrow_list, n_thread):
+
+        threading.Thread.__init__(self)
+
+        self.preemption_space = preemption_space
+        self.arrow_list = arrow_list
+        self.n_thread = n_thread
+        self.cur_id = -1
+
+    def run(self):
+        thread_list = []
+
+        while not User.stop:
+
+            #print("--- Mesures et écoute ---")
+            #print("Espace global de préemption :\t {}".format(self.preemption_space))
+            #print("Liste des flèches :\t {}".format(self.arrow_list))
+
+            ## Tirer une flêche au hasard
+            n = int(random.random()*len(self.arrow_list))
+            elected_arrow = self.arrow_list[n]
+
+            ## Vérification de l'espace global de préemption autour de la flêche
+            if not(len(thread_list) >= self.n_thread) and self.preemption_space[elected_arrow[0]]:
+                print("Espace local libre à {}".format(elected_arrow[0]))
+                self.preemption_space[elected_arrow[0]] = False
+
+                ## Création du thread local
+
+                self.cur_id += 1
+
+                thread_list.append(
+                    LocalThread(self.cur_id,
+                        elected_arrow[0],
+                        elected_arrow[1],
+                        TRANSITIONS_TREE
+                    )
+                )
+
+                ## Lancer le thread local
+                thread_list[-1].start()
+
+            for thread in thread_list:
+                if not thread.is_alive():
+                    if not thread.returncode.__class__ is SuccessfulOperation:
+                        if thread.returncode.__class__ is FailedOperation:
+                            print("A optimiser : créer une règle")
+                        else:
+                            raise thread.returncode
+                    print("Thread local n°{} est terminé".format(thread.id))
+
+                    self.preemption_space[thread.address] = True
+                    thread_list.pop(thread_list.index(thread))
+
+        ## Sortie du scheduler
+        print("Attente de la fin des thread locaux")
+
+        for thread in thread_list:
+            thread.join()
+            if not thread.returncode.__class__ is SuccessfulOperation:
+                if thread.returncode.__class__ is FailedOperation:
+                    print("A optimiser : créer une règle")
+                else:
+                    raise thread.returncode
+            print("Thread local n°{} est terminé".format(thread.id))
+
+
+ARROW_NUMBER = 150
+SPACE_SIZE = 100
+PREEMPTION_GLOBAL_SPACE = [True] * SPACE_SIZE
+ARROW_LIST = [(random.randint(0,SPACE_SIZE - 1),0) for x in range(ARROW_NUMBER)]
+TRANSITIONS_TREE = None
+MAX_THREAD = 50
+
+scheduler = GreatScheduler(PREEMPTION_GLOBAL_SPACE, ARROW_LIST, MAX_THREAD)
+
+def test():
+    scheduler.start()
+    time.sleep(10)
+    User.stop = True
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