Create a watercolor clipart picture of a cute guinea pig sitting next to a birthday cake, with small flowers and greenery. The guinea pig should be a friendly and curious breed, and the cake should be a single-tier design with pastel colors and simple decorations, such as sprinkles and candles. The flowers and greenery should be scattered around the cake and the guinea pig, creating a whimsical and natural feel. The guinea pig can be holding a small party hat or a miniature banner to add to the