Ключевые слова: abstract, art, background, black, computer, decoration, design, endless, escher, experiment, eyesight, fractal, geometric, geometrical, graphic, gray, illusion, illustration, imagine, impossible, infinity, instrument, item, join, loop, magic, mobius, novelty, op art, optical, optical art, original, pattern, psychiatrist, shape, stripe, swirl, technical, technology, test, three dimensional, triangle, trickery, tunnel, visual, volume, wall, wallpaper, white,