Preheat oven to 350 degrees. Combine flour, oats, baking soda, cinnamon and salt; set aside. Cream butter; gradually add sugars, beating until light and fluffy. Add egg and vanilla; mix. Alternate additions of dry ingredients and pumpkin, mixing well after each addition. Stir in morsels. For each cookie, drop quarter cup dough onto lightly greased cookie sheet; spread dough into a ghost shape using a thin metal spatula. Or make a qiuck ghost pattern of heavy paper. Make 2 or three poses for realism. Bake 20-25 minutes, til cookies are firm and lightly browned.Remove from cookie sheets; cool on racks. Spread with white royal icing. Trim brown face features with tube-icing.