body {
  /* background-color: #2eb849 */
  background: linear-gradient(90deg,
    hsl(0, 100%, 50%),
    hsl(30, 100%, 50%),
    hsl(60, 100%, 50%),
    hsl(90, 100%, 50%),
    hsl(120, 100%, 50%),
    hsl(150, 100%, 50%),
    hsl(180, 100%, 50%),
    hsl(210, 100%, 50%),
    hsl(240, 100%, 50%),
    hsl(270, 100%, 50%),
    hsl(300, 100%, 50%),
    hsl(330, 100%, 50%),
    hsl(360, 100%, 50%))
}
.picture {
  margin: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%
}