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# Activity 1 — Digital Input Bingo (W1+W2)
# Level 3 | First Month Recap
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from machine import Pin
import time

# ── Button inputs (PULL_UP: pressed = 0) ────────
btn = [
    Pin(12, Pin.IN, Pin.PULL_UP),
    Pin(13, Pin.IN, Pin.PULL_UP),
    Pin(14, Pin.IN, Pin.PULL_UP),
    Pin(15, Pin.IN, Pin.PULL_UP),
]

# ── LED outputs ─────────────────────────────────
led = [
    Pin(2,  Pin.OUT),
    Pin(4,  Pin.OUT),
    Pin(5,  Pin.OUT),
    Pin(18, Pin.OUT),
]

def blink_all(times):
    for _ in range(times):
        for l in led: l.value(1)    # all on
        time.sleep(0.15)
        for l in led: l.value(0)    # all off
        time.sleep(0.15)

while True:
    pressed = [btn[i].value() == 0 for i in range(4)]
    for i in range(4):
        led[i].value(1 if pressed[i] else 0)   # mirror
    if all(pressed):       # BINGO: all 4 pressed
        print('BINGO!')
        blink_all(3)
    if any(pressed):
        print('Pressed:', [i+1 for i in range(4) if pressed[i]])
    time.sleep(0.05)       # 50ms polling