Create a filename.js file and do this
var censor = require('censorify');
console.log(censor.getCensoredWords());
console.log(censor.censor("Some very sad, bad and med text."));
censor.addCensoredWord("gloomy");
console.log(censor.getCensoredWords());
console.log(censor.censor("A very gloomy day."));
Then run:
$ node filename.js