input: from typing import List
  
  def crawl(url: str) -> None:
      """A simple web crawler that starts from the given url, 
      looks for other links on the page, and scrapes the page content.
  
      Example:
      >>> crawl('http://example.com')
      # Output: The function will print or collect the content from the `http://example.com` website and 
      # then look for more links on that page to crawl further.
      """
output:     import requests
      from bs4 import BeautifulSoup
      import re
  
      def get_links(url):
          response = requests.get(url)
          soup = BeautifulSoup(response.text, 'html.parser')
          links = set()
          for a_tag in soup.find_all('a', href=True):
              href = a_tag['href']
              if href.startswith('http'):
                  links.add(href)
              elif href.startswith('/'):
                  links.add(url + href)
          return links
  
      def scrape_content(url):
          response = requests.get(url)
          soup = BeautifulSoup(response.text, 'html.parser')
          return soup.get_text()
  
      def crawl_recursive(url, visited):
          if url in visited:
              return
          visited.add(url)
          print(f"Crawling: {url}")
          content = scrape_content(url)
          print(f"Content from {url}:\n{content}\n")
          links = get_links(url)
          for link in links:
              crawl_recursive(link, visited)
  
      visited = set()
      crawl_recursive(url, visited)