      useNativeDriver Warning

 WARN  Animated: `useNativeDriver` was not specified. This is a required option and must be explicitly set to `true` or `false`

the fix:
`
  componentDidMount() {
    Animated.loop(
      Animated.timing(this.rotateAnim, {
        toValue: 8,
        duration: this.props.speed,
        useNativeDriver: true, // add this line
      })
    ).start();
  }

`