body{
    height: 100vh;
    width: 100vw;
    background-color: black;
    text-align: center;
    justify-content: center;
    align-items: center;
}
h1{
    position: relative;
    width: 80%;
    height: 20%;
    color: transparent;
    background: linear-gradient(to right top, #ff0000, #ff7300, #fffb00, #48ff00, #00ff7f, #00ffff, #0066ff, #7f00ff, #ff00ff, #ff007f, #ff0000);
    background-clip: text;
}