Ключевые слова: area, background, beat, cardiogram, competition, contour, element, equipment, field, flat, football, game, glowing, goal, ground, health, heartbeat, icon, illustration, isolated, life, light, line, linear, medical, medicine, monitor, neon, outline, pitch, play, playground, police, pulse, rate, referee, set, sound, sport, stadium, symbol, texture, tool, view, warning, wave,