Question: To paint a wall,
Options:
pour paint into a roller pan, roll a roller brush through the paint in the pan, then use the roller brush to spread it onto the wall.
pour paint onto the floor, roll a roller brush through the paint on the floor, then use the roller brush to spread it onto the wall.
Answer: pour paint into a roller pan, roll a roller brush through the paint in the pan, then use the roller brush to spread it onto the wall.