I don't see the changes using xlim with patches by drawing a surface

When i try to patch a parallelogram , i can't see the changes due to the instruction xlim .

surf=axes;
xlim(surf,[-20 +15]);
xlabel('x');
zlim(surf,[-15 +15]);
zlabel('z');
ylim(surf,[-15 +15]);
ylabel('y');
axis equal
vertices=[1,1,1;4,1,1;4,4,1;1,4,1; 1,1,4;4,1,4;4,4,4;1,4,4];
patch(surf,'Vertices',vertices,'Faces',[1,2,3,4;1,2,6,5;3,2,6,7;4,3,7,8;4,1,5,8;5,6,7,8]);

Answer 1

[darova]

see my recommendations

[Andrea Gusmara]

thank you , now it works correctly