Pattern Generator

create a function that accepts 1 (one) parameter and returns a string that has such a pattern:

parameter: 1, generate pattern:

x```

• parameter: 2, generate pattern:

  x
  x x
  x
  

• parameter: 3, generate pattern:

   x
    x
  x o x
  x
   x
  

• parameter: 4, generate pattern:

    x
     x
    o x
  x o o x
  x o
   x
    x
  

• parameter: 5, generate pattern:

     x
      x
     o x
      o x
  x o x o x
  x o
   x o
    x
     x
  

• parameter: 6, generate pattern:

      x
       x
      o x
       o x
      x o x
  x o x x o x
  x o x
   x o 
    x o
     x 
      x
  

and so on...

assume that:

• N is an integer within range [-100..200]

• the function should return empty string if given parameter lower than 1

additional info

the result is compared with smart algorithm, so you don't have to worry about additional space characters that's not visible.

for example, this string:

    x    \n     x   \n    o x  \n     o x \nx o x o x\n x o     \n  x o    \n   x     \n    x    \n

which is seen as:

    x    
     x   
    o x  
     o x 
x o x o x
 x o     
  x o    
   x     
    x    

is treated the same as:

    x\n     x\n    o x\n     o x\nx o x o x\n x o\n  x o\n   x\n    x

which is seen as:

    x
     x
    o x
     o x
x o x o x
 x o
  x o
   x
    x

because both are visibly the same.