def squarePict(pict, x):
#@param pict: picture
#@param x: int
   if(getWidth(pict)==getHeight(pict)):
      for i in range(getWidth(pict)):
         for j in range(getHeight(pict)):
            pxc=getPixel(pict, x, i)
            pxr=getPixel(pict, j, x)
            c=getColor(pxc)
            r=getColor(pxr)
            setColor(pxc, r)
            setColor(pxr, c)
      show(pict)
   else: show(pict)