mmDraw creates the image y by a superposition of rectangles and lines of gray-level k1 on the image f. Each rectangle or line is defined by two pairs of points (Row,Column): (R1,C1) and (R2,C2). For a rectangle, (R1,C1) and (R2,C2) represent, respectively, its left low and right upper corner, while for a line, they represent their extremities. The syntax of representation of a rectangle, a filled rectangle, and a line are, respectively, RECT: R1,C1,R2,C2, FRECT:R1,C1,R2,C2, and LINE:R1,C1,R2,C2. A sequence of definitions of lines and rectangles is closed by the command END. Lines and rectangles definitions are delimited by colon (:).