body{
    margin:0;
    padding:0;
    overflow:hidden;
    font-size:100%;
    font-family:Arial
}

.colorb{
    float:right;
    width:10%;
    height:12px;
    background:blue;
    display:block
}

.div2{
    width:100%;
    height:100vh;
    float:left
}
.div2 img{
    width:25%;
    border:3px solid #e1e1e1
}
.div2 .half img{
    width:calc((25%/2) - 5px);
}
.div2 img:hover{
    border:3px solid #df2e17
}
#itemz{
    position:fixed;
    width:728px;
    bottom:30px;
    right:30px;
    overflow:hidden;
    color:#888;
    background-color:#ccc;
    height:90px;
    z-index:17
}