diff --git a/DAS/block.py b/DAS/block.py
index 5c09ca1..3119167 100644
--- a/DAS/block.py
+++ b/DAS/block.py
@@ -1,31 +1,27 @@
 #!/bin/python3
 
 import random
+from bitarray import bitarray
+from bitarray.util import zeros
 
 class Block:
 
     blockSize = 0
-    data = []
+    data = bitarray()
 
     def __init__(self, size):
         self.blockSize = size
-        self.data = [0] * (self.blockSize*self.blockSize)
+        self.data = zeros(self.blockSize*self.blockSize)
 
     def fill(self):
         for i in range(self.blockSize*self.blockSize):
-            self.data[i] = random.randint(1, 9)
+            self.data[i] = 1
 
     def getColumn(self, columnID):
-        column = [0] * self.blockSize
-        for i in range(self.blockSize):
-            column[i] = self.data[(i*self.blockSize)+columnID]
-        return column
+        return self.data[columnID::self.blockSize]
 
     def getRow(self, rowID):
-        row = [0] * self.blockSize
-        for i in range(self.blockSize):
-            row[i] = self.data[(rowID*self.blockSize)+i]
-        return row
+        return self.data[rowID*self.blockSize:(rowID+1)*self.blockSize]
 
     def print(self):
         dash = "-" * (self.blockSize+2)
diff --git a/DAS/validator.py b/DAS/validator.py
index bfe0adb..a570e88 100644
--- a/DAS/validator.py
+++ b/DAS/validator.py
@@ -2,6 +2,8 @@
 
 import random
 from DAS.block import *
+from bitarray import bitarray
+from bitarray.util import zeros
 
 class Validator:
 
@@ -87,15 +89,10 @@ class Validator:
                 self.getColumn(c, broadcasted)
 
     def sendColumn(self, c, columnID, broadcasted):
-        column = [0] * self.blockSize
-        for i in range(self.blockSize):
-            if broadcasted.data[(i*self.blockSize)+columnID] == 0:
-                broadcasted.data[(i*self.blockSize)+columnID] = self.columns[c][i]
+        broadcasted.data[columnID::self.blockSize] |= self.columns[c]
 
     def sendRow(self, r, rowID, broadcasted):
-        for i in range(self.blockSize):
-            if broadcasted.data[(rowID*self.blockSize)+i] == 0:
-                broadcasted.data[(rowID*self.blockSize)+i] = self.rows[r][i]
+        broadcasted.data[rowID*self.blockSize:(rowID+1)*self.blockSize] |=  self.rows[r]
 
     def sendRows(self, broadcasted):
         if self.proposer == 1: