.bottomTOP {
    width: 50px;
    height: 50px;
    background-color: greenyellow;
    border-radius: 100px;
    border: 2px solid black;
    box-shadow: 3px 1px 5px black;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    position: fixed;
    bottom: 50px;
    margin-left: 30px;
    left: -100px;
    transform: translateX(-100%);
    opacity: 0;
    transition: all .8s ease;
}

.active{
    left: 50px;
    transform: translateX(-100%);
    opacity: 1;
}