var
    StreamResponder = require('node-stream-responder');
 
var
    responder = new StreamResponder();
 
responder.sequence
    .step(trigger1, response1) // wait for `trigger` then respond writing `response` to the stream
    .step(trigger2, response2) // each trigger can be a string or a regular expression
    .control() // control flow; wait for `trigger3` or `trigger5`
        .branch()
            .step(trigger3, response3)
            .step(trigger4, response4)
        .end() // end branch. mandatory
        .branch()
            .step(trigger5, response5)
            .control() // you can nest control structures
                .branch()
                    .step(trigger6, response6)
                .end() // optional
            .end() // optional
        .end() // optional
    .end() // optional
.end(); // optional
 
responder.observe(stream);