import neopixel
import time
from machine import Pin


# Configuration
LED_COUNT = 8
DATA_PIN = 22
FRC_BLUE = (0, 102, 178)
FRC_RED = (236, 34, 41)
COLOR = FRC_RED

# Initialize strip
pin = Pin(DATA_PIN, Pin.OUT)
strip = neopixel.NeoPixel(pin, LED_COUNT)

def shift_on(steps=32, duration_ms=500):
    """
    Fade the whole strip from black to COLOR.
    """
    delay = duration_ms / steps / 1000
    for step in range(steps + 1):
        # Calculate brightness ratio (0.0 to 1.0)
        ratio = step / steps
        color = tuple(int(c * ratio) for c in COLOR)
        strip.fill(color)
        strip.write()
        time.sleep(delay)

def shift_off(steps=32, duration_ms=500):
    """
    Fade the whole strip from COLOR to black.
    """
    delay = duration_ms / steps / 1000
    for step in range(steps, -1, -1):
        ratio = step / steps
        color = tuple(int(c * ratio) for c in COLOR)
        strip.fill(color)
        strip.write()
        time.sleep(delay)

def pulse(iterations=3):
    """
    Performs the pulse effect a set number of times.
    """
    for _ in range(iterations):
        shift_off()
        shift_on()

# Run the effect
try:
    strip.fill((100,180,100))
    strip.write()
except KeyboardInterrupt:
    # Clear pixels on exit
    strip.fill((0, 0, 0))
    strip.write()