body {
 font-family: sans-serif;
 background: linear-gradient(
        90deg,
        rgba(255, 0, 0, 1) 0%,
        rgba(255, 154, 0, 1) 10%,
        rgba(208, 222, 33, 1) 20%,
        rgba(79, 220, 74, 1) 30%,
        rgba(63, 218, 216, 1) 40%,
        rgba(47, 201, 226, 1) 50%,
        rgba(28, 127, 238, 1) 60%,
        rgba(95, 21, 242, 1) 70%,
        rgba(186, 12, 248, 1) 80%,
        rgba(251, 7, 217, 1) 90%,
        rgba(255, 0, 0, 1) 100%
    );
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

h1{
	text-align:center;
	font-size: 2em;
  color: #ffffff;
}