body{
    display: flexbox;
}
header{
    background-color: bisque;
    text-align: center;
}
ol>li{
    color: darkblue;
}
#ejemplo{
    margin:auto;
    justify-content: center;
    width: 15em;
    border-color: black;
    border: inset;
    background-color: rgb(255, 254, 214);
}
body{
    background-image: linear-gradient(rgb(250, 250, 250),bisque);
}
footer{
    margin: 1px, 1px, 1px, 1px;
    padding-top: 20px;
    padding-bottom: 20px;
    text-align: end;
    color: white;
    background-color: black;
}