const fs = require('fs');
fs.writeFile("test.txt", "Hey there!", function(err) {
    if(err) {
        return console.log(err);
    }

    console.log("The file was saved!");
});

fs.readFile('test.txt', 'utf8', function(err, contents) {
    console.log(contents);
});

console.log('after calling readFile');