h1 {
    color: red;
    text-align: center;
    text-shadow: 50px;
}
.diddy{
    animation-name: rgb;
    animation-duration: 5s;
    color:red;
}

#grad{
     background-image: linear-gradient(to top, red, blue, pink, brown, magenta, purple); 
  
     height: 200px;
}

@keyframes rgb{
    from {background-color: red;}
    to {background-color: aqua;}
}