* {
    margin: 0px;
    padding: 0px;
}

html, body {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #aaaaaa;
}

canvas {
    margin: 0px auto;
    cursor: pointer;
}