input: 
  def create_blockchain():
      """ Creates a simple blockchain system in Python.
      The function creates a genesis block and then adds consecutive blocks for each 
      item in the list of transactions. It returns the entire blockchain.
      Example:
      blockchain_transactions = [] # Assume some transactions are added here
      create_blockchain()
      # Output: The blockchain consisting of all blocks from the genesis block onwards.
      """
  
output:     blockchain = []
      genesis_block = {
          'index': 0,
          'previous_hash': '0',
          'timestamp': time.time(),
          'transactions': [],
          'nonce': 0,
          'hash': hashlib.sha256(str(0).encode() + '0'.encode() + str(time.time()).encode() + str([]).encode() + str(0).encode()).hexdigest()
      }
      blockchain.append(genesis_block)
      
      for i, transactions in enumerate(blockchain_transactions):
          block = {
              'index': i + 1,
              'previous_hash': blockchain[-1]['hash'],
              'timestamp': time.time(),
              'transactions': transactions,
              'nonce': 0
          }
          block['hash'] = hashlib.sha256(str(block['index']).encode() + block['previous_hash'].encode() + str(block['timestamp']).encode() + str(block['transactions']).encode() + str(block['nonce']).encode()).hexdigest()
          blockchain.append(block)
      
      return blockchain