You need to have NodeJS and npm installed in your system (node version 4.x or higher). 

Let's start by creating a directory. The command is the one given in the following:

mkdir MyFirstRippleApp && cd MyFirstRippleApp

Now, let's create package.json in our newly created directory as shown in the following, which will install the dependencies we need to work with Ripple's APIs:

{
  "name": "my_ripple_experiment",
  "version": "0.0.1",
  "license": "MIT",
  "private": true,
  "//": "Change the license to something appropriate. You may want to use 'UNLICENSED' if you are just starting out.",
  "dependencies": {
    "ripple-lib": "*",
    "babel-cli": "^6.0.0",
    "babel-preset-es2015": "*"
  },
  "babel": {
    "presets": ["es2015"]
  },
  "devDependencies": {
    "eslint": "*"
  }
}

Let's run the following command to install the required packages:

npm install

Great, we have everything set up, so let's make our first application.