body {
    background-color: lightgrey;
    color: blue;
  }
  
  h1 {
    background-color: red;
    color: white;
  }
  
  h2 {
    background-color: blue;
    color: white;
  }
  
  h3 {
    background-color: white;
    color: blue;
  }

  h4 {
    background-color: lightgrey;
    color: red;
  }

  div {
    background-color: blue;
    color: white;
  }
  h1 {
    text-align: center;
  }
  
  h2 {
    text-align: center;
  }
  
  h3 {
    text-align: center;
  }
 
  h4 {
    text-align: center;
  }

  h1 {
    font-size: 40px;
  }
  
  h2 {
    font-size: 30px;
  }
  
  p {
    font-size: 20px;
    text-align: center;
    }