Generate a black and white children's coloring book image in a Disney style depicting the Angel Gabriel announcing Mary's pregnancy. The Angel Gabriel should be portrayed as a friendly and benevolent character with flowing robes and angelic wings. He should have a gentle smile on his face as he delivers the news to Mary. Mary should be depicted with a look of surprise and wonder, perhaps with her hands clasped in front of her in a gesture of awe. The background could feature a heavenly setting with soft clouds and rays of light streaming down, adding to the magical atmosphere of the scene.