diff --git a/ejercicios_hilos/ej02.py b/ejercicios_hilos/ej02.py
index 253e321..b31d53e 100644
--- a/ejercicios_hilos/ej02.py
+++ b/ejercicios_hilos/ej02.py
@@ -1,10 +1,12 @@
 import threading
 import time
+import random
 
 def escribePunto():
   for i in range(100):
     print (".", end="",flush=True)
-    time.sleep(0.1)
+     #  time.sleep(0.1)
+    random.uniform(0.1, 0.2)
   return
 
 print ("INICIO")
@@ -13,4 +15,5 @@ t.start()
 
 for i in range(50):
   print ("-", end="",flush=True)
-  time.sleep(0.2)
\ No newline at end of file
+  #  time.sleep(0.2)
+  random.uniform(0.2, 0.3)
\ No newline at end of file