Draw a horizontal line for the seat
Add two slightly angled lines downward from each end for the front and back legs
Draw a second horizontal line below the first for the seat thickness
Connect the seat edges to form a rectangular seat
Add two more legs at the back if needed for support
Draw a backrest by adding two vertical or slightly angled lines upward from the rear of the seat
Connect the backrest lines with a horizontal top line
Add support bars between the legs and seat
Refine the bench shape with clean outlines
Erase any extra guide lines
Add shading or simple details if desired