'''
Mission 9 - Game Spinner
The program will act as a digital arrow spinner.
It introduces user-defined functions, a parameter
and argument. It uses variables for the index, 
controlling a loop, and varying the delay (speed of
the arrow spinning). It also uses a logical operator 
(or) for buttons pressed.
'''

from codex import *
import random
from time import sleep

# Select a random arrow from the built-in list
def show_random_arrow():
    num = random.randrange(8)
    display.show(pics.ALL_ARROWS[num])

# Animation that shows the arrows spinning
def spin_animation(count):
    delay = 0.05
    index = 0
    loops = 0
    while loops < count:
        my_arrow = pics.ALL_ARROWS[index]
        display.show(my_arrow)
        sleep(delay)
        delay = delay + 0.005
        loops = loops + 1
        index = index + 1
        if index == 8:
            index = 0

# == MAIN PROGRAM ==
while True:
    if buttons.is_pressed(BTN_A) or buttons.is_pressed(BTN_B):
        spin_animation(20)
        show_random_arrow()