Create a black-and-white coloring sheet featuring a cute capybara sitting comfortably on a doughnut-shaped pontoon floating on a calm lake. The capybara wears dark sunglasses and holds a martini glass with a stick and olive. The doughnut pontoon has a simple sprinkle pattern and thick edges. The lake is surrounded by plants, reeds, and rocks, with ducks or swans nearby. The background includes a sunny sky with rays and fluffy clouds, tall trees with birds, a distant mountain range, and additional details like a sailboat, butterflies, and a beach ball. Include gentle waves, aquatic plants, and a frog or dragonfly for extra charm.