every time i run the following code :
:- use_module(contestlib, [writeN/2]).
cross(N) :-
hor_line(N),
N1 is N - 1,
B1 is N1 // 2,
Middle is N1 + B1,
down(N,’*’,0,N1),
down(N,’.’,N1,B1),
blanks(1), blanks(Middle), stars(1), nl,
up(N,’.’,Middle,B1),
up(N,’*’,N1,N1),
hor_line(N).
hor_line(N) :-...