As many Coloradans get ready to celebrate the Fourth of July, theres some confusion in Douglas County over the sale and use of fireworks.A viewer emailed Denver7 about a man holding a "fireworks for sale" sign in Douglas County on the corner of Plum Creek Parkway and Wilcox Street in Castle Rock right next to another sign warning individual fireworks are not allowed within the county. Watch the full story in the video player below. Confused abou…