App.tsx

// Split the static star data out from the props type
interface StarData {
  id: number;
  x: number;
  y: number;
}

interface StarProps extends StarData {
  time: Animated.SharedValue<number>;
}

// Build an array of star data and spread them across the screen
const stars: StarData[] = [];
const starCount = 50;
const windowWidth = Dimensions.get("window").width;
const windowHeight = Dimensions.get("window").height;

for (var i = 0; i < starCount; i++) {
  stars.push({  
    id: i,
    x: windowWidth / 2 + windowWidth * (Math.random() - 0.5),
    y: windowHeight / 2 + windowHeight * (Math.random() - 0.5),
  });
}