问似乎无法使我的感应器语句在Python-turtle中正常工作。

EN

#importing turle
import turtle

#Creating our turtle and naming it
turtle = turtle.Turtle()


#Ask the user what to do and tell the instructions
#Make a function for the instructions
def instructions():
  print("What do you want me to do? Please choose the letter corresponding to the action: ")
  print("Forward = f")
  print("Turn right = r")
  print("Turn left = l")
  print("Turn backwards = b")
  print("If you want to stop: stop\n")

#print out the instuctions
instructions()

#Function for drawing by getting the user's input
def drawing():
  while True:
    user = input("What you want to do?: ")
  
  #If they want to go forward
    if user == "f":
      l = int(input("How many pixels you want to go forward?: "))
      turtle.forward(l)
  
  #If they want to turn right
    elif user == "r":
      x = int(input("How many degrees you want to turn right?: "))
      turtle.right(x)
  
  #If they want to turn left
    elif user == "l":
      y = int(input("How many degrees you want to turn left?: "))
      turtle.left(y)
  
  #If they want to turn backwards
    elif user == "b":
      z = 180
      turtle.right(z)
      
  #If they want to stop the program
    if user == "stop":
      print("\nOk, I will stop the program now\n\nTo make a new drawing, re-run the program")
      break
  #If they type anything else
   else:
     print("Wrong input!")



drawing()