Test

const star = {
    x: window.innerWidth,
    y: window.innerHeight
};

const random = (min, max) => {
   return Math.floor(Math.random() * (max - min)) + min;
};

cost makeStar = star => {
    const newStar = { ...star };
    newStar.x = random(0, star.x);
    newStar.y = random(0, star.y)
    return newStar;
};