from machine import Pin
from utime import sleep
print("Hello, Pi Pico!")
print("This is Experiment - 3 and Objective - 5")
print("Name: Chinmaya Priyadarshan Sethi; Registration No.: 1941012849")
print("Objective : 5 Implementation of a 4-bit binary counter to show numbers in binary using four LEDs.")

led1 = Pin(0, Pin.OUT)
led2 = Pin(1, Pin.OUT)
led3 = Pin(2, Pin.OUT)
led4 = Pin(3, Pin.OUT)

for i in range(0, 16):
  num=i
  if num>=8:
    led4.value(1)
    num=num%8
  if num>=4:
    led3.value(1)
    num=num%4
  if num>=2:
    led2.value(1)
    num=num%2
  if num==1:
    led1.value(1)
  sleep(1)

  led1.value(0)
  led2.value(0)
  led3.value(0)
  led4.value(0)
  sleep(1)