body {
    background-color: rgb(204, 204, 204);
}
#lienzo{
    width: 600px;
    height:600px;
    border:3px rgb(0, 0, 0) solid ;
    display: flex;
    justify-content: center;
    align-items: center;
}
#cara{
     background-color: yellow;
    width: 60%;
    height: 80%;
    /*border: 1px black solid;*/
    border-radius: 50%;
   position: relative;
}
.ojo{
    background-color:black;
    width: 30%;
    height: 35%;
    border: 2px black solid;
    border-radius: 50%;
    position:absolute;
}
#ojo-izquierdo {
    left:20%;
    top: 10%;
}
#ojo-derecho{
    right:20%;
    top: 10%;    
}