Light Reaction Game

A light reaction game where you click a button when the corresponding light goes on and the player will press the button that lights up to complete the round. the game gets progressively harder as the player progresses through the game until the player doesn't press the button in time or they press the wrong button. once finished the buttons all flash the amount of rounds completed and a pattern to signify the high score.

Materials:

Raspberry Pi Pico

Wires

4 x LED

4 x resistor 220Ω

4 x Arcade Button

Push Button

Equipment:

soldering iron

solder

from machine import Pin

import utime

import urandom

# Pin definitions

button_white = Pin(18, Pin.IN, Pin.PULL_UP)

button_pink = Pin(26, Pin.IN, Pin.PULL_UP)

button_green = Pin(2, Pin.IN, Pin.PULL_UP)

button_yellow = Pin(14, Pin.IN, Pin.PULL_UP)

push_button = Pin(11, Pin.IN, Pin.PULL_UP)

led_green = Pin(4, Pin.OUT)

led_yellow = Pin(8, Pin.OUT)

led_white = Pin(20, Pin.OUT)

led_red = Pin(27, Pin.OUT)

# LED and button lists

leds = [led_green, led_yellow, led_white, led_red]

buttons = [button_green, button_yellow, button_white, button_pink]

# Game state

game_active = False

last_button_state = 1

reaction_delay = 0.5 # Initial delay between rounds (seconds)

min_delay = 0.15

delay_decrement = 0.02

score = 0

max_wait_time = 2000 # ms before timeout (loss)

def turn_off_all_leds():

for led in leds:

led.value(0)

def flash_leds(times):

for _ in range(times):

for led in leds:

led.value(1)

utime.sleep(0.3)

for led in leds:

led.value(0)

utime.sleep(0.3)

def wait_for_release(pin):

while pin.value() == 0:

utime.sleep_ms(10)

def play_reaction_game():

global game_active, reaction_delay, score

index = urandom.getrandbits(2) # Random index 0–3

selected_led = leds[index]

selected_button = buttons[index]

selected_led.value(1) # Light up LED

start_time = utime.ticks_ms()

timed_out = False

# Wait for correct button or timeout

while selected_button.value() == 1:

if push_button.value() == 0:

game_active = False

turn_off_all_leds()

return

if utime.ticks_diff(utime.ticks_ms(), start_time) > max_wait_time:

timed_out = True

break

selected_led.value(0)

if timed_out:

game_active = False

return

score += 1

print(f"Round {score} complete")

if reaction_delay > min_delay:

reaction_delay -= delay_decrement

utime.sleep(reaction_delay)

# Main loop

while True:

current_button_state = push_button.value()

# Toggle game state

if last_button_state == 1 and current_button_state == 0:

utime.sleep_ms(200)

game_active = not game_active

wait_for_release(push_button)

if game_active:

print("Game started!")

score = 0

reaction_delay = 0.5

else:

print("Game stopped!")

turn_off_all_leds()

last_button_state = current_button_state

if game_active:

play_reaction_game()

if not game_active:

print(f"Game over! You completed {score} rounds.")

flash_leds(score)

turn_off_all_leds()

else:

turn_off_all_leds()

connect the ground pins to each other

connect anode wires with there own wires