body {
    background-color: black;
    color: darkgreen;
    padding: 10px;
}

p {
    color: lightgray;
}

.prompt {
    margin-left: 5px;
    color: darkgreen;
}

.clignotant {
    animation: animpation-clignotant 1.5s infinite;
}

@keyframes animpation-clignotant {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}