Ключевые слова: abstract, background, circle, color, colorful, colors, colour, colourful, colours, construct, constructing, curve, curves, design, draw, drawing, edge, form, forms, geometric, geometry, instrument, layer, layers, light, lineal, lines, material, materials, optical, optics, pattern, plastic, polarization, polarize, polarized, polygon, rule, ruler, shape, shapes, spectrum, synthetic, template, translucent, transparency, triangle, triangles,