.gallery2 {
    margin:10px 50px;
}

.gallery2 img{
    transition: 1s;
    padding: px;
    width: 400px;
    border-style: solid;
    border-width: 3px;
    border-color: black;
    margin: 10px;
    
}

.gallery2 img:hover {
    filter:grayscale(100%);
    transform: scale(1.1);
}