A way to enjoy your Halloween pumpkins for more than a week is to scrape the design into the skin of the pumpkin.  The white and orange contrast still allows for the design to shine through.  Plus you will not have a rotting squash sitting on your front porch.  Just make sure you do not cut all the way through.  For design ideas, trace leaves or Halloween cookie cutters on to the face and carve out with a ribbon tool.