.mark1 {
    background-color: black;
    color: white;
}

.mark2 {
    background-color: yellow;
}

.mark3 {
    color: grey;
}

.console {
    font-family: "Courier New", monospace;
    font-size: 14px;
    background-color: black;
    color: white;
    padding: 1em;
    margin: 1em,0px,1em,0px;
}