text: 
  const render = require('../')
  const b = require('../../tree')
  const screen = require('./util/screen')
  
  const App = props => {
    return b('box', {
      top: 0,
      left: 20
    }, 'frames: ' + props.text)
  }
  
  let state = 0
  const FPS = 1000 / 60
  
  function main (state) {
    render(b(App, {
      text: state
    }), screen)
  
    setTimeout(() => {
      state++
      main(state)
    }, FPS)
  }
  
  main(state)
  