horrible-hilbert-curve.py

W=32

def f(x, y, w):
    if w==2 and x==0:
        return '┌│'[y]
    if x >= w//2:
        return f(w-1-x, y, w).translate(str.maketrans('┐┘┌└│', '┌└─┘└' if w!=W and y==w-1 else '┌└┐┘│'))

    if y>=w//2:
      if y>=w*3//4:
          return f(x, w+w//2-y-1, w).translate(str.maketrans('┌┐└┘', '└┘┌┐'))
      
      if x>=w//4:
          return f(x+w//4,w-1-y, w).translate(str.maketrans('┌┐└┘', '└┘┌┐'))
      else:
          return f(x,w-1-y-w//4, w).translate(str.maketrans('┌┐└┘', '└┘┌┐'))
    
    return f(x, y, w//2)


for y in range(W):
    for x in range(W):
        q=y==W-1 and x%~-W==0 and '╵' or f(x, y, W)
        print(q, end=q in '┌└─' and '─' or' ')
    print()