What is the ancient door pattern called

Ancient New Year, the family posted the door god, the portrait on the door god are Qin Qiong and Yuchigong, according to legend, when Li Shimin did the emperor no matter whether in the palace or in the bedchamber, there are always Qin Qiong and Yuchigong two people stood outside the door in the two sides to protect the Li Shimin's safety, over time, Li Shimin see two people are so loyal, on the Royal seal two people for the door god, from then on, two people's portraits on the popularity of the portraits as a god of the door! Passed down to this day, and now in some places in the countryside still have the custom of New Year's invitation to the god of the door, the pattern is still Qin Qiong and Yuchigong's portrait.