Ключевые слова: abstract, art, background, black, challenge, circle, collection, concept, design, education, element, entrance, exit, find, game, geometric, geometry, goal, graphic, icon, idea, illustration, isolated, labyrinth, line, logo, maze, monochrome, object, puzzle, question, round, search, set, shape, sign, simple, solution, solve, square, success, symbol, three, triangle, way, white,