body{
    background: black;
}

canvas{
    background: black;
    display: block;
    margin: 40px auto;
}

.button{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: 10px;
    grid-auto-rows: minmax(100px, auto);
    width: 30%;
    
    border: solid 1px white;
    margin: 0 auto;
}

.haut{
    grid-row: 1;
    grid-column: 2;
}

.gauche{
    grid-row: 2;
    grid-column: 1;
}

.droite{
    grid-row: 2;
    grid-column: 3;
}

.bas{
    grid-row: 3;
    grid-column: 2;
}