body {
    text-align: center;
}

#etch {
    margin-top: 25px;
    margin-left: auto;
    margin-right: auto;
    width: 800px;
    height: 800px;
    display: grid;
    grid-template-columns: repeat(16, 1fr);
    grid-template-rows: repeat(16, 1fr);
    border: solid;
    border-color: black;
    border-width: 5px;
}

.color {
    background: blue;
}