html {
    margin: 0;
}

.nva {
    margin: 10px 20px;
    display: flex;
    gap: 25px;
    font-size: 20px;
}

span {
    display: block;
}

.canvas {
    width: 80%;
    text-align: center;
    margin: 100px auto;
}

.button {
    height: 100px;
    width: 100px;
    border: 2px solid black;
    display: inline-block;
}

#grey {
    background-color: grey;
}

#white {
    background: white;
}

#blue {
    background: blue;
}

#yellow {
    background-color: yellow;
}