where to configure the require?

[seasonscao]

var  rdp = require('node-rdpjs');
var client = rdp.createClient({ 
    domain : 'my_domain', 
    userName : 'my_username',
    password : 'my_password',
    enablePerf : true,
    autoLogin : true,
    decompress : false,
    screen : { width : 800, height : 600 },
    locale : 'en',
    logLevel : 'INFO'
}).on('connect', function () {
}).on('close', function() {
}).on('bitmap', function(bitmap) {
}).on('error', function(err) {
}).connect('XXX.XXX.XXX.XXX', 3389);

Where to paste it?