digital art, realistic style, traffic light with three circular lenses, each lens containing a different colored cat face, top lens red cat with serious expression, middle lens orange cat with neutral expression, bottom lens green cat with calm expression, blue sky background with scattered white clouds, metal texture of the traffic light, cats have detailed fur textures, bright and vivid colors, vertical orientation, framed by gray borders on both sides, realistic lighting and shadows, whimsical and surreal concept, no other objects or people in the image