body {
    margin: 0;
    padding: 0;
    overflow: hidden;
}

#background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: black;
    z-index: -1;
    animation: noise 2s infinite linear alternate-reverse;
}

@keyframes noise {
    0% {
        background: 
            linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px) 0 0,
            linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px) 0 0,
            linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px) 0 0,
            linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px) 0 0;
        background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
    }
    50% {
        background: 
            linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px) 0 0,
            linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px) 0 0,
            linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px) 50px 50px,
            linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px) 0 0;
        background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
    }
    100% {
        background: 
            linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px) 0 0,
            linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px) 0 0,
            linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px) 50px 50px,
            linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px) 0 0;
        background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
    }
}

#container {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

#ball {
    width: 200px;
    height: 200px;
    background-color: black;
    border-radius: 50%;
    cursor: pointer;
    }