#2 leds are connected to pico pins gp0 and gp1 respectively.
# wap such that the leds will flash alternately every 0.5sec.

from machine import Pin
import utime

flash = 0.5

on = 1
off = 0

led1 = Pin(0, Pin.OUT)
led2 = Pin(1, Pin.OUT)

while True:
  led1.value(on)
  led2.value(off)
  utime.sleep(flash)
  led1.value(off)
  led2.value(on)
  utime.sleep(flash)