Ключевые слова: abstract, backdrop, background, black, blue, circle, circles, cogs, concept, curve, decoration, decorative, fantasy, futuristic, gears, green, hole, illusion, illustration, machine, machinery, mechanical, mechanics, mechanism, motion, optical, orange, pattern, purple, rotate, rotation, round, shape, spin, spiral, striped, stripes, swirl, tech, tunnel, turning, twist, unusual, vortex, weird, wheels, white,