auto save

diy1.py

 import time
 a=time.time()
 list1 = []
-for a in range(0, 1000):
-    for b in range(0, 1000):
+for a in range(0, 10):
+    for b in range(0, 10):
         list1.insert(0, 0)
 b=time.time()
 c=b-a