Create a line drawing of four whimsical insect-like characters. Adjust the features: make one a butterfly with elongated, flowing wings, another a round, cheerful ladybug without spots, a third a quirky grasshopper with oversized ears and a musical note motif, and the last a small, sleek dragonfly with large, sparkling eyes. Surround them with playful, swirling patterns in the background, resembling a gentle garden scene, and add a couple of floating circles above their heads for a whimsical touch.