canvas {
    width: 100%;
    height: 100%;
    margin: 0;
}

body {
    width: 100%;
    margin: 0;
    background-color: black;
    position: relative;
}

.heading {
    position: absolute;
    top: 10px;
    left: 25%;
    text-align: center;
    color: white;
}