Prompt: In the center of the picture is a homeless man huddled on a street corner. He is wearing tattered clothes, his hair is disheveled, and he has an expression of exhaustion and despair on his face. The surrounding environment is very cold, the streets are covered with snow, and heavy snowflakes are floating in the sky. Behind the homeless man is a row of dim lights. The composition of the picture adopts a symmetrical composition, with the homeless man in the center of the picture, and the symmetrical buildings and lights on the left and right form the frame of the picture. The colors of the picture are mainly cold tones, with blue, gray and black as the main colors. Cool colors are used in the homeless man's clothing and surroundings. The painting uses rough and powerful lines. Rugged lines are used in both the homeless man's clothes and his surroundings. He has a strong ability to observe and capture the details of life, and his expression of the characters' emotions is also very good. Draw a very rough picture according to the above requirements