Style.css

#container {
    margin: auto;
    display: flex;
    flex-direction: column;
    width: fit-content;
    align-items: center;
    border: 2px solid grey;
    animation-name: BG;
    animation-duration: 4s;
    animation-iteration-count: infinite;
    animation-play-state: running;
}

.box {
    background-color: white;
    margin: 10px;
    padding: 20px;
    border-style: groove;
    animation-name: BG;
    animation-duration: 4s;
    animation-iteration-count: infinite;
}


@keyframes BG {
    0% {
        background-color: tomato;
    }

    25% {
        background-color: rgb(235, 210, 19);
    }

    50% {
        background-color: rgb(47, 255, 217);
    }

    75% {
        background-color: rgb(217, 76, 78);
    }

    100% {
        background-color: tomato;
    }
}

.toogle-animation {
    align-items: center;
    text-align: center;
    margin-top: 20px;
}

.button {
    font-size: large;
    padding: 20px;
    background-color: rgba(255, 165, 0, 0);
    border-radius: 20px;
    transition-property: background-color;
    transition-duration: 0.2s;

    box-shadow: 0 9px #999;
    cursor: pointer;
    outline: none;
    transition: 0.1s all;
}

.button:hover {
    background-color: rgba(255, 165, 0, 255);
}

.button:active {
    background-color: #3e8e41;
    box-shadow: 0 5px #666;
    transform: translateY(4px);
}