body {
    color: yellow;
    background-color: green;
}
#go {
    width: 200px;
    transition: width 2s;
    border: 10px ridge yellow;
}
#go:hover {
    width: 400px;
}
#tex {
    border: 10px ridge yellow;
}
#num {
    border: 10px ridge yellow;
}
#resp {
    border: 15px ridge yellow;
    display: none;
}