set("figure_style","new") /// @@prerequisite /// \sleftarrow{\normalfont open a new graphic window  }
a=get("current_axes");  /// \sleftarrow{\normalfont get a handle on the newly created axes}
a.data_bounds=[-1,-1;1,1];  /// \sleftarrow{\normalfont set the boundary values {for} x and z }
xrect(0,0,0.5,0.5)  /// \sleftarrow{\normalfont draw a rectangle }
r=get("hdl");/// \sleftarrow{\normalfont get the current node, i.e, the last created objects }
r /// \sleftarrow{\normalfont \verb+r+ is a handle to a Rectangle entity }
r.fill_mode="on";  /// \sleftarrow{\normalfont changing the displayed rectangle's properties }
r.foreground=5; 
r_line_style=6;