input: 
  from typing import List, Any
  
  class Block:
      def __init__(self, index: int, timestamp: str, data: Any, previous_hash: str):
          self.index = index
          self.timestamp = timestamp
          self.data = data
          self.previous_hash = previous_hash
          self.hash = self.hash_block()
  
      def hash_block(self) -> str:
          import hashlib
          sha = hashlib.sha256()
          sha.update((str(self.index) + 
                      str(self.timestamp) + 
                      str(self.data) + 
                      str(self.previous_hash)).encode('utf-8'))
          return sha.hexdigest()
  
  def create_genesis_block() -> Block:
      return Block(0, "01/01/2021", "Genesis Block", "0")
  
  def next_block(last_block: Block, data: Any) -> Block:
      this_index = last_block.index + 1
      this_timestamp = "10/02/2021"  # Example timestamp
      this_data = data
      this_hash = last_block.hash
      return Block(this_index, this_timestamp, this_data, this_hash)
  
  def create_blockchain(transactions: List[Any]) -> List[Block]:
      blockchain = [create_genesis_block()]
      previous_block = blockchain[0]
  
      for data in transactions:
          block_to_add = next_block(previous_block, data)
          blockchain.append(block_to_add)
          previous_block = block_to_add
      
      return blockchain
  
  def print_blockchain(blockchain: List[Block]):
      for block in blockchain:
          print(f"Block Index: {block.index}")
          print(f"Block Timestamp: {block.timestamp}")
          print(f"Block Data: {block.data}")
          print(f"Block Hash: {block.hash}")
          print()
  
  # Example usage
  blockchain_transactions = ["First block data", "Second block data", "Third block data"]
  blockchain = create_blockchain(blockchain_transactions)
  print_blockchain(blockchain)
  
output:     
      for block in blockchain:
          print(f"Block Index: {block.index}")
          print(f"Block Timestamp: {block.timestamp}")
          print(f"Block Data: {block.data}")
          print(f"Block Hash: {block.hash}")
          print()
  