Here is a simple St. Patrick's Day card using a polka dot embossing folder for the background and printed shamrock paper on half the card. I added a banner with Happy St. Patrick's Day and the shamrock accent in the center. I did the same thing on the other card, but I used different shamrock paper for the entire card and used a green rectangle embossed with polka dots for the bottom half of the card.
Both cards are easy to create with a few simple steps and look amazing. Happy St. Patrick's Day!