Clouds are always different. You cannot catch that one you granted with an equivalence linked to your world of familiar and known objects. The wind will drag it and will give it another shape, it will baptise it with another name or even irrevocably tear it apart. The blue sky is just like this red and grooved desert, and the clouds are sand dunes. They travel like their sisters from the sky, sometimes they hold hands. They arrive at the frozen sea carried by the wind, a perfect architect for impossible and short-lived buildings, which are beautiful precisely since they are perishable. Clouds and sand dunes head together for the steam that will destroy them, or turn them into something different.You cannot catch clouds neither sand dunes. The wind drags them and draws impossible and short-lived shapes with them.