reaction_game.py

from gpiozero import Button, LED
from time import sleep, time
from random import random, seed
from sys import exit

seed()

greenLed = LED(12)
greenLed.off()

yellowLed = LED(21)
yellowLed.off()

redLed = LED(20)
redLed.off()

myButton = Button(16)

#-----Behavior Variables----

minPauseTime = 1.5
maxPauseTime = 6
maxTriggerTime = 2

#-----Stats Variables------

roundsCompleted = 0

#----------
def allOff():
    redLed.off()
    yellowLed.off()
    greenLed.off()

def gameOver(msg = None):
    print ("You completed " + str(roundsCompleted) + " rounds. Congrats!")
    if msg != None: print(str(msg))
    sleep(1)
    allOff()
    exit()
    

allOff()
print ("Welcome to the game!")
print ("When you see the GREEN LED turn on, press your button!")
print ("If you take too long, or press the button for any other LED, you lose!")
print ("-")
print ("Press the button when you're ready to begin")

while not myButton.is_pressed:
    pass

print ("Starting in 3...")
sleep(1)
print ("2...")
sleep(1)
print ("1...")
sleep(1)
print ("GO!")


while True:
    startTime = time()
    pauseTime = random() * (maxPauseTime - minPauseTime) + minPauseTime
    
    allOff()
    roundWon = False
    
    #watch for a button press in case the user presses th ebutton too early)
    while (time() < startTime + pauseTime):
        if myButton.is_pressed: gameOver("Pressed button too soon")

    onTime = time()

    #Green button lights up:
    if random() < .33:
        greenLed.on()
        while (time() < onTime + maxTriggerTime):
            if myButton.is_pressed:
                roundsCompleted += 1
                roundWon = True
                break
        if roundWon == False:
            gameOver("Missed the green LED")
       
    #some other LED lights up:
    else:
        if random() < .5:
            led = yellowLed
        else:
            led = redLed
        led.on()
        while (time() < onTime + maxTriggerTime):
            if myButton.is_pressed: gameOver("Wrong LED Color")
        roundsCompleted += 1
        roundWon = True

print("End of Game")