Ключевые слова: additional, background, backgrounds, black, blackboard, blurred, board, chalk, chalk drawing, chalkboard, colorful, concept, dirty, drawing, dust, effect, empty, eraser, exceptionally, explosion, extra, great, great news, handwriting, idea, letter, material, media, medium, messy, motion, news, pattern, rays, script, sign, smudge, smudged, space, symbol, text, texture, textured, unusually, white, word, write,