Prompt: Office space, tooling, office, sketch, messy lines, don't video, don't be too delicate, draw a little more casually, lines at will, lines don't be too thick, casual picture, don't have heavy shadows, hand-drawn lines, the picture is clean, the picture composition is small, the space is large, the vision is open, the hand-painted effect, less decoration, hand-painted, don't be realistic, black and white, picture, perspective, big open and close, the picture is clean, don't have miscellaneous lines,