body {
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f0f0f0; /* Hintergrundfarbe */
}

#pixel {
    width: 1px;
    height: 1px;
    background-color: red; /* Startfarbe */
}