程式碼是不是排版有排錯？

    if indentIncreasing:
        #increase the number of spaces:
        indent = indent + 1
        if indent == 20:
            #change direction
            indentIncreasing = False

上面這段程式碼應該縮排進去變成以下

import time, sys
indent = 0 #how many space to indent
indentIncreasing = True

try:
    while True: #The main program loop.
        print(' ' * indent, end='')
        print('********')
        time.sleep(0.1) #pause for 1/10 of a second.
        if indentIncreasing:
            #increase the number of spaces:
            indent = indent + 1
            if indent == 20:
                #change direction
                indentIncreasing = False
        else: 
            #Decrease the number of space:
            indent = indent - 1
            if indent == 0:
                indentIncreasing  = True
except KeyboardInterrupt:
    sys.exit()

寫了個簡化版的,你觀察看看.當然這個並不是最好的.方法有很多,你可以多嘗試.
在做無窮的版本之前,可以先做簡化版本的,方便觀察.

#!/usr/bin/env python3

indent = 0
leftright = 1

for i in range(60):
  print(' ' * indent, end='')
  print('*')
  
  if indent >= 20:
    leftright = -1
  if indent <= 0:
    leftright = 1
  
  indent = indent + leftright

indent = 9
increasing = -1

bound = abs(indent) + abs(increasing)

while True:
    if abs(indent + increasing) >= bound:
        increasing = -increasing

    print(" " * abs(indent) + "****")
    indent += increasing

這樣就好了吧...