#happy-container {
        position: absolute;
        width: 150px;
        height: 150px;
        left: 100px;
        top: 5500px;
    }

    .btn-happy {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        opacity: 0;
        transition: transform 1s, opacity 1s;
        transform-origin: center center;
    }

    #btn-happy.show {
        opacity: 1;
        transform: scale(1);
    }

    #btn-happy.hide {
        opacity: 0;
        transform: scale(1.2);
    }

    #btn-happy2.show {
        opacity: 1;
        transform: scale(1);
    }

    #btn-happy2.hide {
        opacity: 0;
        transform: scale(1.2);
    }