block.
No literal leprechauns in this design, but lots of their favorite color: green. You have a starry midnight green sky, green flowers, and green leaves. Between those are sine wave orbs and hearts, twisting tendrils, corkscrew vines, and curls. Add a little light blue to all the shades of green, and you can probably see how that leprechaun would be able to hide in this place (mostly to keep everyone from stealing his pot of gold). (file y133b2, #4755952)