text: window.addEventListener("load", function(event) {
  	// stars
  	const w = window.innerWidth, h = window.innerHeight;
  	const div = getById("space-background");
  	const s = w*h*0.0009;
  	for (let i = 0; i < s; i++) {
  		const star = createEl("div");
  		star.classList.add("star");
  		star.style.opacity = Math.random() * 100 + "%";
  		star.style.top = Math.random() * h + "px";
  		star.style.left = Math.random() * w + "px";
  		const siz = Math.random() * 5;
  		star.style.width = star.style.height = siz + "px";
  		div.appendChild(star);
  	}
  });