"""
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ LED Blinking Using Raspberry Pi (MicroPython)            ┃
┃                                                          ┃
┃ Design and implement in Raspberry Pi 4 a circuit with    ┃
┃ 8 LEDs. Make a mechanism that allows the following       ┃
┃ patterns: (LED Pattern 1, 2, & 3 in picture shown)       ┃
┃                                                          ┃
┃ Copyright (c) 2024 CPE4B - Group 1                       ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
"""

from machine import Pin
from utime import sleep

pins = [28, 27, 26, 22, 21, 20, 19, 18]
leds = [Pin(i, Pin.OUT) for i in pins]
 
# Pattern 1
def pattern1():
    for led in leds:
        led.on()
        sleep(0.5)
        led.off()

    for led in reversed(leds):
        led.on()
        sleep(0.5)
        led.off()
 
# Pattern 2
def pattern2():
    red_indices = [0, 2, 4, 6]
    blue_indices = [1, 3, 5, 7]
    
    patterns = [
        (red_indices, blue_indices), 
        (blue_indices, red_indices),
        (red_indices, blue_indices),
        (blue_indices, red_indices),
        (red_indices, blue_indices),
        (blue_indices, red_indices),
    ]
    
    for on_indices, off_indices in patterns:
        for index in on_indices:
            leds[index].on()
        sleep(0.5)
       
        for index in on_indices:
            leds[index].off()

# Pattern 3
def pattern3():
    pattern_steps = [
        ([0, 7], []),
        ([1, 6], []), 
        ([2, 5], []),
        ([0, 7], []),
        ([3, 4], []),
        ([], []),
        ([0, 7], []),
        ([1, 6], []),
        ([2, 5], []),
        ([0, 7], []),
        ([3, 4], []),
        ([], []), 
    ]
    
    for on_indices, off_indices in pattern_steps:
        for index in on_indices:
            leds[index].on()
        sleep(0.5)

        for index in on_indices:
            leds[index].off()

# Main loop
while True:
    pattern1()
    sleep(1)
    pattern2()
    sleep(1)
    pattern3()
    sleep(1)