diff --git a/filter.py b/filter.py
index 4150df2..9a5dec4 100644
--- a/filter.py
+++ b/filter.py
@@ -1,28 +1,37 @@
 from PIL import Image
 import numpy as np
-img = Image.open("img2.jpg")
-arr = np.array(img)
-a = len(arr)
-a1 = len(arr[1])
-i = 0
-while i < a - 11:
-    j = 0
-    while j < a1 - 11:
-        s = 0
-        for n in range(i, i + 10):
-            for n1 in range(j, j + 10):
-                n1 = arr[n][n1][0]
-                n2 = arr[n][n1][1]
-                n3 = arr[n][n1][2]
-                M = n1 + n2 + n3
-                s += M
-        s = int(s // 100)
-        for n in range(i, i + 10):
-            for n1 in range(j, j + 10):
-                arr[n][n1][0] = int(s // 50) * 50
-                arr[n][n1][1] = int(s // 50) * 50
-                arr[n][n1][2] = int(s // 50) * 50
-        j = j + 10
-    i = i + 10
-res = Image.fromarray(arr)
-res.save('res.jpg')
+import sys
+
+
+def get_mosaic_image(image, mosaic_size=10, gradation=4):
+    threshold = 255 // gradation
+    image_tensor = np.array(image).astype(int)
+    image_length = len(image_tensor)
+    image_height = len(image_tensor[0])
+    i = 0
+    while i < image_length:
+        j = 0
+        while j < image_height:
+            sector = image_tensor[i: i + mosaic_size, j: j + mosaic_size]
+            colors_sum = np.sum(sector)
+            average_color = int(colors_sum // (mosaic_size ** 2))
+            set_color(int(average_color // threshold) * threshold / 3, image_tensor, mosaic_size, i, j)
+            j += mosaic_size
+        i += mosaic_size
+    return Image.fromarray(np.uint8(image_tensor))
+
+
+def set_color(new_color, tensor, mosaic_size, i, j):
+    for sector_i in range(i, i + mosaic_size):
+        for sector_j in range(j, j + mosaic_size):
+            for c in range(3):
+                tensor[sector_i][sector_j][c] = new_color
+
+
+if __name__ == "__main__":
+    source_name = sys.argv[1]
+    output_name = sys.argv[2]
+
+    source_img = Image.open(source_name)
+    image_tensor = np.array(source_img).astype(int)
+    get_mosaic_image(image_tensor, mosaic_size=10, gradation=5).save(output_name)
diff --git a/res.jpg b/res.jpg
index d8d97ff..01f85a9 100644
Binary files a/res.jpg and b/res.jpg differ