.red {
background-color: red;
}
.green {
background-color: green;
}
.blue {
background-color: blue;
}
.yellow {
background-color: yellow;
}
.sphere {
height: 200px;
width: 200px;
border-radius: 50%;
text-align: center;
vertical-align: middle;
font-size: 500%;
position: relative;
box-shadow: inset -10px -10px 100px #000, 10px 10px 20px black, inset 0px 0px 10px black;
display: inline-block;
margin: 5%;
}
.sphere::after {
background-color: rgba(255, 255, 255, 0.3);
content: '';
height: 45%;
width: 12%;
position: absolute;
top: 4%;
left: 15%;
border-radius: 50%;
transform: rotate(40deg);
}