What constellation is the vertical arrangement of three stars?

That's Orion. Winter is an obvious and magnificent constellation. The obvious sign is that there are three stars evenly arranged, and four stars outside form a quadrilateral. In this constellation, there are two bright stars, Betelgeuse (the seventh brightest star except the sun in the whole day) and Betelgeuse (the twelfth brightest star except the sun in the whole day, with a serious red color).