Ключевые слова: 60s, abstract, antiwar, app, art, background, black, circle, design, drawing, drawn, element, emblem, freedom, graphic, grunge, hand, harmony, hippie, hippy, hope, icon, illustration, isolated, long, love, pacificist, pacifism, pacifist, paint, peace, peaceful, retro, shadow, shape, sign, silhouette, simple, sixties, sketch, spirit, stroke, style, symbol, symbolism, unity, war, world, yellow,