input: Write a function to scrape the title and content from the homepage of a given website using Python. The function should use the `requests` and `bs4` libraries to fetch and parse the webpage. If both the title and content elements are found, they should be printed; otherwise, the function should raise a ValueError indicating which elements were not found. The function should take a single argument, the URL of the website to scrape.
  
  ### Example Usage:
  assert scrape_website('https://www.example.com')
  
  ### Expected Output:
  Returns the title and content of the website, or raises a ValueError if any of the elements are not found.
output: def scrape_website(url):
      import requests
      from bs4 import BeautifulSoup
      
      response = requests.get(url)
      soup = BeautifulSoup(response.content, 'html.parser')
      
      title = soup.title.string if soup.title else None
      content = soup.find('body') if soup.find('body') else None
      
      if not title:
          raise ValueError("Title not found")
      if not content:
          raise ValueError("Content not found")
      
      return title, content.get_text()