Glitch画像作るやつ

glitch.js

var fs = require('fs');

var inImageData = false;

var o = Math.random() * 255 | 0,
	r = Math.random() * 255 | 0;

var orig = fs.readFileSync('./original.jpg'), 
	glit = new Buffer(orig.length);

for(var i = 0; i < orig.length; i++){

	glit[i] = orig[i];

	if(orig[i] === o && inImageData){
		glit[i] = r;
	}

	if(orig[i] === 0xDA && orig[i - 1] === 0xFF){
		inImageData = true;
	}

}

fs.writeFileSync('./glitch.jpg', glit);