* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background: black;
}
 #canv {
    outline: white solid 1px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    /* width: 200px;
    height: 200px; */
    filter: contrast(0.5) brightness(1) saturate(2);
}