Status Icons ( CSS only )

HTML

<span class="green"> </span>
<span class="red"> </span>
<span class="yellow"> </span>

CSS

span {
    background-color: green;
    display: block;
    height: 20px;
    width: 20px;
    border-radius: 10px;
    border: 1px;
    border-color:
}

.green { background-color: green }
.red { background-color: red; }
.yellow { background-color: yellow }