#circle {
    position: fixed;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    background-color: rgba(255, 255, 255, 0.2);
    border: 1px solid #000;
    border-radius: 50%;
    pointer-events: none;
    transform: translate(var(--xpos), var(--ypos));
    transition: width 0.2s ease, height 0.3s ease, border-radius 0.3s ease;
    z-index: 9999;
}