Happy? How about hearts and flowers, and celebratory stars? Ah what a coincidence, my Bernina happens to do those all by itself ;-)
On a background of black cotton drill over pelmet Vilene, I machined a tangle of overlapping motifs. In red, amber and green of course.
I don't use the built-in embroidery patterns much, but I quite like the effect when they're massed together, a bit distorted, worked in all directions and interacting with each other.