export default class YourComponent extends Component {
  constructor(props) {
    super(props)
  }

  _onTick() {
    console.log(`_onTick`)
  }

  _onFinish() {
    console.log(`_onFinish`)
  }

  render() {
  	let till = new Date('5/14/2016 13:56:00')
    return (
      <View>
        <CountdownTimer
          till={till}
          renderTick={(data) => <TimeLabel {...data} />}
          onTick={this._onTick.bind(this)}
          onFinish={this._onFinish.bind(this)}
        />
      </View>
    )
  }
}

class TimeLabel extends Component {
  render() {
    return (
      <View>
        <Text>
          {this.props.hours} : {this.props.minutes} : {this.props.seconds}
        </Text>
      </View>
    )
  }
}