Illustrate a scene from a vintage St. Patrick’s Day parade with characters in early 20th-century attire, including children wearing green caps and holding balloons, and adults in green vests and bow ties. The parade should also feature a classic car adorned with shamrocks and a banner that reads "St. Patrick’s Day Parade." The entire scene should be rendered in a charming, old-world illustration style, set against a stark white background to make each detail pop. --s 750