Wokwi - Online ESP32, STM32, Arduino Simulator

import machine
import utime

pin = [6,7,8,9,10,11,12,13,14,15]
led= []
for i in range(10):
    led.append(None)
    led[i] = machine.Pin(pin[i], machine.Pin.OUT)

while True:
    for i in range(10):
        led[i].toggle()
        utime.sleep(0.2)

/\ This resistor is going to the side because of the gap in the ground rail.

< This red wire doesn't matter since its not connected to anything. It's there just because I have a habit of connecting the power rails.