body {
    margin: 0;
    overflow: hidden;
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;

}
canvas {
    display: block;
    border: 2px solid #333;
    background-color: #fff;
    margin: 0 auto;
}
#scoreboard {
    text-align: center;
    font-size: 24px;
    margin-top: 20px;
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}