body {
    margin: 0;
    height: 100vh;
    background-color: black;
    overflow: hidden;
}

h1 {
    color: #fefefe;
    margin: 2%;
}

span {
    background: url("https://cdn4.iconfinder.com/data/icons/general-office/91/General_Office_54-512.png");
    width: 100px;
    height: 100px;
    position: absolute;
    pointer-events: none;
    background-size: cover;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    animation: animate 6s linear;
}

button {
    position: fixed;
    margin: 50px;
    height: 80px;
    width: 400px;
    outline: none;
    border: none;
    border-radius: 10px;
    font-size: 25px;
    font-weight: 600;
    cursor: pointer;
}

button:hover {
    background-color: palevioletred;
    color: black;
    position: fixed;
    margin: 50px;
    height: 80px;
    width: 400px;
    outline: none;
    border: none;
    border-radius: 10px;
    font-size: 25px;
    font-weight: 600;
    cursor: pointer;
}

@keyframes animate {
    0% {
        transform: translate(-50%, -50%);
        opacity: 1;
        filter: hue-rotate(0);
    }

    100% {
        transform: translate(-50%, -5000%);
        opacity: 0;
        filter: hue-rotate(720deg);
    }
}

@media screen and (min-width : 0px) and (max-width : 500px) {
    button {
        position: fixed;
        margin: 50px;
        height: 80px;
        width: 300px;
        outline: none;
        border: none;
        border-radius: 10px;
        font-size: 20px;
        font-weight: 600;
        cursor: pointer;
    }

    button:hover {
        background-color: palevioletred;
        color: black;
        position: fixed;
        margin: 50px;
        height: 80px;
        width: 300px;
        outline: none;
        border: none;
        border-radius: 10px;
        font-size: 20px;
        font-weight: 600;
        cursor: pointer;
    }
}