import machine
import utime

LED1=machine.Pin(0,machine.Pin.OUT)
LED2=machine.Pin(1,machine.Pin.OUT)
LED3=machine.Pin(2,machine.Pin.OUT)
LED4=machine.Pin(3,machine.Pin.OUT)

while True:
  LED1.toggle()
  utime.sleep(1)
  LED2.toggle()
  utime.sleep(1)
  LED3.toggle()
  utime.sleep(1)
  LED4.toggle()
  utime.sleep(1)


main.py

diagram.json

import machine
import utime
LED=machine.Pin(1,machine.Pin.OUT)
while True:
    LED.value(1)
    utime.sleep(1)
    LED.value(0)
    utime.sleep(1)

toggleled.py

import machine
import utime

LED1=machine.Pin(0,machine.Pin.OUT)
LED2=machine.Pin(1,machine.Pin.OUT)
LED3=machine.Pin(2,machine.Pin.OUT)
LED4=machine.Pin(3,machine.Pin.OUT)

while True:
  LED1.toggle()
  utime.sleep(1)
  LED2.toggle()
  utime.sleep(1)
  LED3.toggle()
  utime.sleep(1)
  LED4.toggle()
  utime.sleep(1)


fourled.py

from machine import Pin
import utime
LED=Pin(0,Pin.OUT)
btn=Pin(28,pin.IN)
LED.value(0)
while True:
    if(btn.value()==0):
        LED.value(1)
        utime.sleep(1)
        LED.value(0)