var amount=50;var sky=$('.sky');for(var i=0;i<amount;i++){var star=$('<div class="star-blink"><div></div></div>');star.css({'top':Math.random()*100+'%','left':Math.random()*100+'%','animation':'blinkAfter 15s infinite '+Math.random()*100+'s ease-out','width':Math.random()*2+7+'px','height':Math.random()*2+7+'px','opacity':Math.random()*5/10+0.5});sky.append(star);}