*{
    margin: 0;
    padding: 0;
    border: 0;
    box-sizing: border-box;
}
html,body{
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}
canvas{
    background-color: #000;
    border: solid 3px #ff0000;
    border-radius: 20px;
}