const { getOne } = require('kanahei-wallpapers')
 
getOne().then(wallpaper => console.log(wallpaper))

{ title: '湖のほとりの小鳥2',
  images:
   [ 'http://www.kanahei.com/upload/2016/06/2_k_1280_1024.jpg',
     'http://www.kanahei.com/upload/2016/06/2_k_1600_1200.jpg',
     'http://www.kanahei.com/upload/2016/06/2_k_1920_1200.jpg' ] }