cats.html

<img 
    srcset="images/my-cat-xs.jpg 250w, image/my-cat-s.jpg 500w, image/my-cat-m.jpg 1000w, image/my-cat-l.jpg 1000w, image/my-cat-xl.jpg 1500w"
    sizes="(min-width: 1300px) 1300px, (min-width: 1024px) 69vw, (min-width: 700px) 85vw, 50vw"
    src="image/my-cats-s.jpg"
/>