html {
  box-sizing: border-box;
}

*,
*:before,
*:after {
  box-sizing: inherit;
}

body {
  width: 400px;
  max-width: 100%;
  height: 400px;
  background-color: aqua;
  background-image: url(../value/images/GoOnlineDj.png);
  background-repeat: round;
}