div {
    text-align : center;
}
button {
    font-family: "comic sans ms", "Tahoma";
    font-size: 24pt;
    border-radius: 20%;
    background-color: fuchsia;
    color :yellow;
    box-shadow: 0 6px black;
}
html {
   background-color : chartreuse;
}
button:hover {
    transition: 2s;
    color : fuchsia;
    background-color: yellow;
    cursor : wait;
}