.heading{
    color: pink;
    background-color: black;
    text-align: center;
    font-size: 40px;
}
div{
    /* background-color: red; */
    /* font-size: 50px; */
    /* text-align: center; */
}
div{
    height: 50px;
    width: 50px;
    display: inline-block;
    border: 2px solid black;
}