Ключевые слова: background, billboard, black, blackboard, blank, board, buddhism, calm, calmness, chalk, chalkboard, challenge, color, concept, copy, crossword, drawing, entertainment, grunge, handwriting, harmony, health, intelligence, mind, natural, oriental, puzzle, relax, relaxation, solution, spirituality, symbol, text, texture, therapy, treatment, wellbeing, wellness, white, wooden, word, write, zen,