img {
    margin: 50px;
    box-shadow: 4px 2px 0 red,
        8px 4px 0 orange,	
        12px 6px 0 yellow,
        16px 8px 0 green,
        20px 10px 0 blue,
        24px 12px 0 indigo,
        28px 14px 0 violet
}