#3.Pattern display using 6-leds
from machine import Pin
from time import sleep

led2=Pin(12,Pin.OUT)
led3=Pin(14,Pin.OUT)
led4=Pin(17,Pin.OUT)

led5=Pin(18,Pin.OUT)
led6=Pin(19,Pin.OUT)
led7=Pin(21,Pin.OUT)
count=5
while count>0:
   led2.on()
   led3.on()
   led4.on()
   sleep(1)
   led2.off()
   led3.off()
   led4.off()
   
   led5.on()
   led6.on()
   led7.on()
   sleep(3)
   led5.off()
   led6.off()
   led7.off()
   count=count-1