h2 {
    color: darkblue;
}

p {
    font-size: 18px;
    line-height: 1.6;
}

.btn {
    background-color: lightgray;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: gray;
}

.box {
    width: 100px;
    height: 100px;
    background-color: red;
    position: relative;
    animation: move 5s infinite;
}

@keyframes move {
    0% {
        left: 0;
    }

    50% {
        left: 200px;
    }

    100% {
        left: 0;
    }
}