diff --git a/blockshell.py b/blockshell.py
index e423245..ba1a139 100644
--- a/blockshell.py
+++ b/blockshell.py
@@ -1,12 +1,30 @@
+# -*- coding: utf-8 -*-
+# ==================================================
+# ==================== META DATA ===================
+# ==================================================
+__author__ = "Daxeel Soni"
+__url__ = "https://daxeel.github.io"
+__email__ = "daxeelsoni44@gmail.com"
+__license__ = "MIT"
+__version__ = "0.1"
+__maintainer__ = "Daxeel Soni"
+
+# ==================================================
+# ================= IMPORT MODULES =================
+# ==================================================
 import hashlib
 import datetime
 import json
 from colorama import Fore, Back, Style
 import time
 
-# index, timestamp, previousHash, blockHash, data
-
+# ==================================================
+# ====================BLOCK CLASS ==================
+# ==================================================
 class Block:
+    """
+        Create new block with arguments 'data'
+    """
     def __init__(self, data, index=0):
         self.index = index
         self.previousHash = ""
@@ -16,10 +34,16 @@ class Block:
         self.hash = self.calculateHash()
 
     def calculateHash(self):
+        """
+            Method to calculate hash for the block.
+        """
         hashData = str(self.index) + str(self.data) + self.timestamp + str(self.nonce)
         return hashlib.sha256(hashData).hexdigest()
 
     def mineBlock(self, difficulty):
+        """
+            Mine block with proof of work by initial zeros algorithm.
+        """
         print Back.RED + "\n[Status] Mining block (" + str(self.index) + ") with PoW ..."
         startTime = time.time()
 
@@ -33,14 +57,23 @@ class Block:
         print Style.RESET_ALL
 
 class Blockchain:
+    """
+        Inititate new blockchain with this class.
+    """
     def __init__(self):
         self.chain = [self.createGenesisBlock()]
         self.difficulty = 3
 
     def createGenesisBlock(self):
+        """
+            Method to create genesis block after just creating an object.
+        """
         return Block("Genesis Block")
 
     def addBlock(self, newBlock):
+        """
+            Method to mine new block from data to blockchain.
+        """
         newBlock.index = len(self.chain)
         newBlock.previousHash = self.chain[-1].hash
         newBlock.mineBlock(self.difficulty)
@@ -48,6 +81,9 @@ class Blockchain:
         self.writeBlocks()
 
     def writeBlocks(self):
+        """
+            This method will write newly created block to chain.txt file in json format.
+        """
         dataFile = file("chain.txt", "w")
         chainData = []
         for eachBlock in self.chain: