JS Coding Challenge Solution - https://medium.com/@kitze/js-coding-challenge-1-test-your-skills-63c2af5446d0#.40xyjne8w

sequence.js

const arr = [
  () => this.setState({moveCircleToMiddle: true}),
  1000,
  () => this.setState({showGrayCircle: true}),
  () => this.setState({showMicrophone: true}),
  500,
  () => this.setState({moveCircleToTop: true}),
  1000,
  () => this.setState({pulseGrayCircle: true}),
  500,
  () => this.setState({okText: 1}),
  500,
  () => this.setState({okText: 2}),
  500,
  () => this.setState({googleText: 1}),
  500,
  () => this.setState({googleText: 2})
];

const delay = ms => new Promise(resolve => setTimeout(resolve, ms));

async function sequence(...arr) {
  for (const el of arr) {
    typeof el === 'function' ? el() : await delay(el);
  }
};

sequence.apply(this, arr);