"""LED tutorial script for NeoPixel in the browser editor.

Run this file and watch the in-app NeoPixel simulator panel.
"""

from machine import Pin
import neopixel
import time


LED_COUNT = 12
np = neopixel.NeoPixel(Pin(4), LED_COUNT)


def show_step(title: str):
    print(f"\n--- {title} ---")


show_step("Step 1: single colors")
np.fill((0, 0, 0))
np.write()
time.sleep(0.2)
np[0] = (255, 0, 0)  # red
np[1] = (0, 255, 0)  # green
np[2] = (0, 0, 255)  # blue
np.write()
time.sleep(0.8)

show_step("Step 2: fill strip")
np.fill((40, 0, 120))
np.write()
time.sleep(0.6)

show_step("Step 3: moving pixel")
for i in range(len(np)):
    np.fill((0, 0, 0))
    np[i] = (255, 120, 0)
    np.write()
    time.sleep(0.06)

show_step("Step 4: simple pulse")
for level in list(range(0, 200, 20)) + list(range(200, -1, -20)):
    np.fill((level, 0, level // 3))
    np.write()
    time.sleep(0.05)

show_step("Done")
np.fill((0, 0, 0))
np.write()
print("Tutorial complete.")