diff --git a/Concurrent Programming.py b/Concurrent Programming.py
index 857ff6e..18c49f5 100644
--- a/Concurrent Programming.py	
+++ b/Concurrent Programming.py	
@@ -1,3 +1,35 @@
+from threading import Thread
+import random # juste pour que le temps de travail des threads soit aléatoire
+import time
+
+
+arrows = []
+local_threads_number = 10
+
+def init():
+    for j in range(0, local_threads_number):
+        arrows.append(j % 10)
+    print(arrows,'   <  initial arrows state')
+
+def local_thread(coord):
+    while True:
+        time.sleep(random.randint(0,1))
+        arrows[coord] = (arrows[coord] + 1) % 10
+        print(arrows,'  ',coord)
+    return
+
+init()  #   Scheduler
+for i in range(0, local_threads_number):
+    t = Thread(target=local_thread, args=(range(i,i+1)))
+     # argument after * must be an iterable, not int  <  ?
+    t.start()
+
+#  Je ne l'isole pas dans un autre fichier  
+###########################################################################################
+
+
+
+
 from threading import Thread
 from datetime import timedelta
 from datetime import datetime