var fs = require("fs");
var buffer = fs.readFileSync("2388");

function getRandomInt() {
  return Math.floor(Math.random() * Math.floor(255));
}

function setImage(i, ar){
    for (var o = 0; o < 0x100000; o += 4)
        for (var pass = 0; pass < 4; pass++)
            buffer.writeUInt8(ar[pass](), 0x72 + (0x100000 * i) + o + pass);
}

setImage(0, [() => { return 0xFF; }, () => { return 0xFF; }, () => { return 0xFF; }, () => { return 0xFF; }])
setImage(1, [getRandomInt, getRandomInt, getRandomInt, () => { return 0xFF; }])
setImage(2, [() => { return 0xFF; }, () => { return 0xFF; }, () => { return 0xFF; }, () => { return 0xFF; }])


fs.writeFileSync("2388", buffer);