just a little mind game,if you aready know the anwser
don't anwser it please, let people try it first:

if you think you know the anwser send me an
private message

here it go:

place the number 1 to 8 in this grid,
the thing is that two consecutive number can't be placed
side to side in all way(-,| or /)
Code:
   ___
 _|_|_|_
|_|_|_|_|
  |_|_|
hope you understand