body {
    font-family: Arial;
}

#container {
    width: 625px;
    height: 240px;
    border: 1px solid blue;
    position: relative;
    margin: 50px auto 10px;
}

#circle {
    width: 86px;
    height: 86px;
    background-color: #00ffff;
    border-radius: 50%;
    position: absolute;
    top: 8px;
    left: 8px;
    cursor: pointer;
}