body{
    font-family: 'Courier New', Courier, monospace;
    margin: 1;
    color: black;
}

h1{
    animation:bounce;
    animation-duration: 2s;
}

.a{
    animation:wobble;
    animation-duration: 2s;
    animation-delay: 2s;
}

.b{
    animation: shakeX;
    animation-duration: 2s;
    animation-delay: 4s;
    animation-direction: normal;
}