body {
    background-color: #2d2e30;
    color: #fff;
    font-family: sans-serif;
}

body {margin: 50px auto;text-align: center}

img {
    /* filter: url(filters.svg#grayscale); Firefox 3.5+ */
      filter: gray; /* IE5+ */
      -webkit-filter: grayscale(1); /* Webkit Nightlies & Chrome Canary */
      -webkit-transition: all 3s ease-in-out;  
    margin-bottom: 20px;
    }

    img:hover {
    filter: none;
      -webkit-filter: grayscale(0);
            -webkit-transform: scale(1.05);

    }
.column1 {width: 49%; float: left;}
.column2 {width: 49%; float: right;}