Revertable functions about jimp HOT 1 CLOSED

var image = new Jimp("./path/to/image.jpg", function (err, image) {
    var original = image.clone(); // clone "image"
    image.greyscale(); // makes "image" grey scale but "original" is unchanged
    image = original; // revert to "original"
});

var image = new Jimp("./path/to/image.jpg", function (err, image) {
    var alteredImage = image.clone().greyscale().invert(); // original "image" is unaffected
});