Create a detailed illustration of a vintage arrow-shaped pointing left sign with a nostalgic and joyful atmosphere. The sign should include: Shape and Text: An arrow-shaped sign with the inscription "par là". The design of the sign should be inspired by the aesthetics of old circuses, with bright colors like red and blue. Details and Ornaments: Stars and ornamental patterns around the sign for a retro style. Twinkling lights or bulbs on the edges of the sign to add a festive touch. Retro Ambiance: Use a retro color palette and vintage design elements. Give the illustration a slight aging effect or a sepia filter to enhance the nostalgic aspect. The entire sign should evoke the joy and excitement of a day at the fair, with particular attention to detail and the authenticity of the retro ambiance. No background is necessary, focus solely on the sign itself.