diff --git a/average.py b/average.py
index a7bb3fc..67d1eea 100644
--- a/average.py
+++ b/average.py
@@ -8,7 +8,9 @@ class step(algorithm):
         self.config_dict_ = None
         self.config_ = None
         self.average_number_ = 10
-        self.window_1_ = None
+        self.present_number_ = 0
+        self.window_1_ = []
+        self.window_2_ = []
 
     def set_config(self, config):
         self.config_ = config
@@ -19,4 +21,10 @@ class step(algorithm):
         return self.config_
 
     def eval(self, value):
-        return value * self.amplitude_base_
+        self.present_number_ = len(self.window_1_)
+        if self.present_number_ < self.average_number_:
+            self.window_1_.append(value)
+            self.window_2_.append(value)
+            return
+        else:
+            return value * self.amplitude_base_
diff --git a/average_func_test.py b/average_func_test.py
index cace41e..2cdb425 100644
--- a/average_func_test.py
+++ b/average_func_test.py
@@ -1,3 +1,10 @@
 from algorithm import algorithm
 import json
-import ray
\ No newline at end of file
+import ray
+import numpy as np
+a = np.zeros(shape=(5,2))
+b = []
+print(a)
+print(type(b))
+print(len(b))
+