played Rubik's cube for quite a long time, from 3x3x3 to 7x7x7.
tried to make some special pattern with 5x5x5, like ( =| ), which is quite successful.....
centre pattern control is easy in 5x, coz it's a relative small dimension.


after having 7x, more complex pattern is doable, like ( =] ).
but unfortunately, wtih the increase in dimension, centre pattern is more difficult to achieve unity, only 5 out of 6 sides of the cube with the desired pattern......


See ! the top side of the second picture is not a ( =] ) !!!
if anyone knows how to achieve the 6th side ( =] ), please do so by leaving a comment, or is it mathematically possible (?)