body {
    padding: 0;
    margin: 0;
  
    background-color: blue;
  }
  
  .wrapper {
    min-height: 100vh;
    width: 100%;
  
    /* background-image: linear-gradient(45deg, red 10%, orange 50%, yellow 70%, green, aqua, blue); */
    /* background-image: repeating-linear-gradient(45deg, yellow 25px, black 25px, black 50px, yellow 50px, yellow 75px, black 75px); */
  
    background-image: repeating-radial-gradient(circle, aqua 20px, red 80px);
  }