input: from typing import List
  
  def crawl(url: str) -> None:
      """ Crawl a given website URL, scraping the page content and following links 
      to other pages on the site. The function should use breadth-first search 
      to explore the website's links.
      >>> crawl('http://example.com')
      (should output the scraped content and follow links on the page)
      """
output:     from collections import deque
      import requests
      from bs4 import BeautifulSoup
      import re
  
      visited = set()
      queue = deque([url])
  
      while queue:
          current_url = queue.popleft()
          if current_url in visited:
              continue
          visited.add(current_url)
  
          try:
              response = requests.get(current_url)
              response.raise_for_status()
          except requests.RequestException as e:
              print(f"Error accessing {current_url}: {e}")
              continue
  
          soup = BeautifulSoup(response.text, 'html.parser')
          print(f"Scraped content from {current_url}:")
          print(soup.get_text())
  
          for link in soup.find_all('a', href=True):
              href = link['href']
              if href.startswith('/'):
                  href = url + href
              if re.match(url, href) and href not in visited:
                  queue.append(href)