Create a vibrant birthday-themed background featuring a colorful party scene. The design should include balloons in various shapes and colors, confetti scattered across the scene, and a large, cheerful cake with lit candles in the center. Surround the cake with gifts wrapped in shiny paper and ribbons. In the background, incorporate a serene blue sky with fluffy white clouds and a rainbow arching over the scene, adding a whimsical touch. Include subtle banners with the text Happy Birthday in playful, festive fonts, making sure the overall atmosphere is joyful and celebratory.

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Create a vibrant birthday-themed background featuring a colorful party scene. The design should include balloons in various shapes and colors, confetti scattered across the scene, and a large, cheerful cake with lit candles in the center. Surround the cake with gifts wrapped in shiny paper and ribbons. In the background, incorporate a serene blue sky with fluffy white clouds and a rainbow arching over the scene, adding a whimsical touch. Include subtle banners with the text Happy Birthday in playful, festive fonts, making sure the overall atmosphere is joyful and celebratory.