# Node.js / io.js Stream Primer > [http://youtu.be/yOSNQZm3Trw](http://youtu.be/yOSNQZm3Trw) Install [io.js](https://iojs.org/en/index.html) or [node.js](https://nodejs.org/). Within this folder run the terminal command `npm install` to install the `dependencies` and `devDependencies`. Then run `npm start` to run the app.