rn-intro-anim1.js

class Intro extends Component {
  state = {
    springVal: new Animated.Value(0.8),
  };

  componentDidMount() {
    setTimeout(() => this.spring(), 2000);
  }

  spring() {
      Animated.spring(this.state.springVal, {
        toValue: 17.5,
        friction: 7,
        tension: 20
      }).start();
  }

  render() {
    return (
      <View style={styles.wrapper}>
        <View style={styles.center}>
          <Animated.Text
            style={{
              transform: [{ scale: this.state.springVal }]
            }}
          >
            <Text style={styles.introText}>biyootiful</Text>
          </Animated.Text>
        </View>
      </View>
    );
  }
}