wall-createbyentlines(entline0 entline1 / line0 line1 angle0 angle1)Create a wall by two lines.
wall-createbypoints(pointlist leftwidth rightwidth)Create walls by points and width.
wall-flip(wallstruct / wentline0 wentline1)Flip this wall's direction.
wall-intersected(wall1 wall2)Trim intersected two walls