from machine import Pin
from utime import sleep
r1=Pin(1,Pin.OUT)
y1=Pin(5,Pin.OUT)
g1=Pin(9,Pin.OUT)
r2=Pin(27,Pin.OUT)
y2=Pin(28,Pin.OUT)
g2=Pin(22,Pin.OUT)
while True:
    y1.off()
    y2.off()
    g1.on()
    r2.on()
    sleep(5.0)
    g1.off()
    r2.off()
    y1.on()
    y2.on()
    sleep(5.0)
    y1.off()
    y2.off()
    r1.on()
    g2.on()
    sleep(5.0)
    g2.off()
    r1.off()
    y1.on()
    y2.on()
    sleep(5.0)