Beat Parkay and sugar very hard. Add vanilla and flour. Divide dough into two parts. Roll each part into 10 or 12 inch long ropes. On two large sheets of waxed paper, place red colored sugar on one and green colored sugar on the other. Roll one cookie dough rope in red sugar and one cookie dough rope in green sugar. Refrigerate until ready to bake. When ready to bake, slice dough with very sharp knife into 1/2 to 3/4 inch slices. Place on ungreased cookie sheet. Bake at 325 degrees until cookies are lightly brown and set.