In this scene, the main focus should be the brown door with the silver doorknob and the sign that reads "LOL Boy Next Door." For the door, use shades of browns ranging from a light tan to a dark cocoa. The round doorknob should be drawn as a brilliant silver. The sign should be outlined in a bold black and filled in with bright yellow. The window above the door should be colored a sunny yellow, and the curtains can be filled in with lighter shades of the same color. The plant on the right side of the door might look best with bright green leaves and a dark brown pot, while the white lamp on the left side should be shaded in with different tints of white for depth. Finally, you might want to add a few touches of color for detail, like a patterned carpet, some colorful accessories, and a nice finishing touch of light blue on the walls to bring the scene together.