Formation clouds over a building under construction in which the protagonists are the cranes over a sky that threatens rain. It is part of a series dedicated to the skies in all their facets, storms, rains, pollution, sunrises, showing the multiple tonalities that nature offers us in sunsets, skies illuminated by factory spills. In this series, I try to show all possible scenes using a demanding palette of colours to achieve the goal I have set myself.