Остановка цикла

import serial 
import time 
import subprocess
print("Loading...")
ArduinoSerial = serial.Serial('/dev/ttyACM0', 9600, dsrdtr = 1, timeout = 0) 
time.sleep(3)
print("Loading successful")
i = 0
va = input()
 
    
    
    
while i < 10:
    def ledon():
        subprocess.Popen(['python3', 'LED_ON.py'])
        time.sleep(1)
        return
    if (va == "1"): 
        ledon()
            
    if (va == "0"):
        subprocess.Popen(['python3', 'LED_OFF.py'])

import serial 
import time 
 
ArduinoSerial = serial.Serial('/dev/ttyACM0', 9600, dsrdtr = 1, timeout = 0) 
time.sleep(2)
ArduinoSerial.write("1".encode())
print ("LED turned ON")

import serial 
import time 
 
ArduinoSerial = serial.Serial('/dev/ttyACM0', 9600, dsrdtr = 1, timeout = 0) 
time.sleep(2)
ArduinoSerial.write("0".encode())
print ("LED turned OFF")
time.sleep(1)

import serial
import time
 
 
def led_on(port):
    port.write("1".encode())
    print("LED turned ON")
 
 
def led_off(port):
    port.write("0".encode())
    print("LED turned OFF")
 
 
print("Loading...")
ArduinoSerial = serial.Serial('/dev/ttyACM0', 9600, dsrdtr=1, timeout=0)
time.sleep(3)
print("Loading successful")
 
for i in range(10):
    led_on(ArduinoSerial)
    time.sleep(1)
    led_off(ArduinoSerial)
    time.sleep(1)
 
ArduinoSerial.close()