body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(90deg, 
        #d60000, #e65c00, #ff4500, #ff5e00,
        #d45d00, #b33c00, #d60000
    );
    background-size: 1400% 100%;
    animation: moveBackground 70s linear infinite;
    color: #f5deb3;
}

@keyframes moveBackground {
    0% {
        background-position: 0% 0%;
    }
    10% {
        background-position: 200% 0%;
    }
    20% {
        background-position: 400% 0%;
    }
    30% {
        background-position: 600% 0%;
    }
    40% {
        background-position: 800% 0%;
    }
    50% {
        background-position: 1000% 0%;
    }
    60% {
        background-position: 1200% 0%;
    }
    70% {
        background-position: 1400% 0%;
    }
    80% {
        background-position: 1200% 0%;
    }
    90% {
        background-position: 1000% 0%;
    }
}