Please design a banner for parents in their 60s, 70s, and 80s to use in birthday parties. The banner measures 150 centimeters wide and 90 centimeters long. The background is white. Flowers and leaves are on the outside and letters are on the inside. Flowers and leaves are watercolor tones. Flowers and leaves are wreath-shaped. The banner is designed to appeal to those in their 30s and 40s. The banner design is calm, attractive, and unique.