canvas {
    position: absolute;
    display: block;
    width: 100%;
    height: 100%;
}

textarea {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 10px;
    border: none;
    background-color: rgba(0,0,0,0);
    color: white;
    text-shadow: 1px 1px 5px black;
    resize: none;
}

.red {
    background-color: red;
    color: white;
}