how to run es6 javascript

run_es6.sh

#apt-get install npm
#ln -s /usr/bin/nodejs /usr/bin/node
echo 'prefix = ${HOME}/.npm-packages' >> ~/.npmrc
git clone https://github.com/stellar/js-stellar-base.git && cd js-stellar-base
npm install -g babel
npm install
babel-node examples/test.js

in babel 6, additional steps required:
$npm install --save-dev babel-preset-s2015
and save

{
  "presets": ["es2015"]
}

in project_root/.babelrc