html, body{
    margin: 0;
    width: 100%;
    overflow: hidden;
}

canvas{
    height:100%;
    width: 100%;
    margin: none;
    position: fixed;
}

#functionInput {
    border: solid white 1px;
    position: absolute;
    z-index: 5;
    bottom: 10px;
    left: 100px;
    background: none;
    color: white;
    padding: 40px;
    font-size: 2em;
}