Smiley CSS.

<style>

.smiley {
    height: 100px;
    width: 100px;
    border: 2px solid #000;
    border-radius: 50%;
    position: relative;
}

.smiley:before {
    content: "";
    height: 20px;
    width: 20px;
    border-radius: 50%;
    position: absolute;
    border: 2px solid #000;
    left: 15px;
    top: 30px;
}

.smiley:after {
    content: "";
    height: 20px;
    width: 20px;
    border-radius: 50%;
    position: absolute;
    border: 2px solid #000;
    right: 15px;
    top: 30px;
}

.smiley span {
    height: 50px;
    width: 50px;
    border-radius: 50%;
    border-bottom: 2px solid red;
    position: absolute;
    bottom: 10px;
    left: 25px;
}

.neutral {
    height: 100px;
    width: 100px;
    border: 2px solid #000;
    border-radius: 50%;
    position: relative;
}

.neutral:before {
    content: "";
    height: 20px;
    width: 20px;
    border-radius: 50%;
    position: absolute;
    border: 2px solid #000;
    left: 15px;
    top: 30px;
}

.neutral:after {
    content: "";
    height: 20px;
    width: 20px;
    border-radius: 50%;
    position: absolute;
    border: 2px solid #000;
    right: 15px;
    top: 30px;
}

.neutral span {
    height: 50px;
    width: 50px;
    border-bottom: 2px solid red;
    position: absolute;
    bottom: 20px;
    left: 25px;
}

.sad {
    height: 100px;
    width: 100px;
    border: 2px solid #000;
    border-radius: 50%;
    position: relative;
}

.sad:before {
    content: "";
    height: 20px;
    width: 20px;
    border-radius: 50%;
    position: absolute;
    border: 2px solid #000;
    left: 15px;
    top: 30px;
}

.sad:after {
    content: "";
    height: 20px;
    width: 20px;
    border-radius: 50%;
    position: absolute;
    border: 2px solid #000;
    right: 15px;
    top: 30px;
}

.sad span {
    height: 50px;
    width: 50px;
    border-radius: 50%;
    border-top: 2px solid red;
    position: absolute;
    bottom: -15px;
    left: 25px;
}

</style>



<div class="smiley"><span></span></div>
<br />
<div class="neutral"><span></span></div>
<br />
<div class="sad"><span></span></div>


Output :)