'''
Mission 6: Heartbeat
Medium Remix - 3rd option
-- Uses a pitch to sound a tone and delay for heartbeat
-- Adds another if statement with a break (2A), and avoids error
'''
from codex import *
from time import sleep

delay = 1

while True:
    # one heartbeat
    display.show(pics.HEART)
    audio.pitch(440, delay)
    display.show(pics.HEART_SMALL)
    audio.pitch(660, delay)

    if buttons.was_pressed(BTN_A):
        delay = delay + 0.2

    if buttons.was_pressed(BTN_B):
        if delay > 0.2:
            delay = delay - 0.2

    if buttons.was_pressed(BTN_D):
        break