body {
  margin: 0;
  height: 100vh;

  /* background image */
  background-image: url("https://i.pinimg.com/1200x/c1/f3/78/c1f3788dd8b1d4fd0911fb21fe6d09de.jpg");
  
  /* loop */
  background-repeat: repeat;

 
  background-position: top left;

  
  background-size: auto;

  
  background-color: #f7f7f7;
}