import * as React from 'react'; import { StyleSheet, View, Text } from 'react-native'; export default function App() { return ( Hello World! ); } const styles = StyleSheet.create({ container: { flex: 1, alignItems: 'center', justifyContent: 'center', backgroundColor: 'white', }, box: { width: 60, height: 60, marginVertical: 20, }, });