Stack Overflow challenge!

1. Create a new text file called "fileio.txt"
2. Write the first line "hello" to the text file.
3. Append the second line "world" to the text file.
4. Read the second line "world" into an input string.
5. Print the input string to the console.

var fs   = require("fs");
var sys  = require("sys");
var path = "fileio.txt";

fs.writeFile(path, "hello", function (error) {
    fs.open(path, "a", 0666, function (error, file) {
        fs.write(file, "\nworld", null, "utf-8", function () {
            fs.close(file, function (error) {
                fs.readFile(path, "utf-8", function (error, data) {
                    var lines = data.split("\n");
                    sys.puts(lines[1]);
                });
            });
        });
    });
});