#logo {
    background-color: #010814db;
    border-radius: 50%;
    height: 1.5rem;
    width: 1.5rem;
    border: 0px inset #aeaeae;
    background-image: url('https://territory-radar.org/bg/radar.gif');
    background-size:      cover;                      /* <------ */
    background-repeat: no-repeat;
    background-position: center center;
}
#largelogo {
    background-color: #010814db;
    border-radius: 50%;
    height: 18rem;
    width: 18rem;
    border: .0px inset #aeaeae;
    background-image: url('https://territory-radar.org/bg/radar.gif');
    background-size:      cover;                      /* <------ */
    background-repeat: no-repeat;
    background-position: center center;
}