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// SPDX-FileCopyrightText: 2017 Phillip Burgess for Adafruit Industries
//
// SPDX-License-Identifier: MIT

#include <Adafruit_NeoPixel.h>

#define PIN       1
#define NUM_LEDS 36

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUM_LEDS, PIN);

uint8_t  mode   = 0,        // Current animation effect
         offset = 0;        // Position of spinner animation
uint32_t color  = 0xA000A0; // Purple
uint32_t prevTime;          // Time of last animation mode switch

void setup() {
  pixels.begin();
  pixels.setBrightness(255); // Full brightness
  prevTime = millis();       // Starting time
}

void loop() {
  uint8_t  i;
  uint32_t t;

  switch(mode) {

   case 0: // Random sparkles - just one LED on at a time!
    i = random(NUM_LEDS);           // Choose a random pixel
    pixels.setPixelColor(i, color); // Set it to current color
    pixels.show();                  // Refresh LED states
    // Set same pixel to "off" color now but DON'T refresh...
    // it stays on for now...both this and the next random
    // pixel will be refreshed on the next pass.
    pixels.setPixelColor(i, 0);
    delay(10);                      // 10 millisecond delay
    break;
 
   case 1: // Spinny wheel
    for(i=0; i<NUM_LEDS; i++) {    // For each LED...
      uint32_t c = 0;              // Assume pixel will be "off" color
      if(((offset + i) & 7) < 2) { // For each 8 pixels, 2 will be...
        c = color;                 // ...assigned the current color
      }
      pixels.setPixelColor(i, c);  // Set color of pixel 'i'
    }
    pixels.show();                 // Refresh LED states
    delay(90);                     // 90 millisecond delay
    offset++;                      // Shift animation by 1 pixel on next frame
    break;

    // More animation modes could be added here!
  }

  t = millis();                    // Current time in milliseconds
  if((t - prevTime) > 8000) {      // Every 8 seconds...
    mode++;                        // Advance to next animation mode
    if(mode > 1) {                 // End of modes?
      mode = 0;                    // Start over from beginning
    }
    pixels.clear();                // Set all pixels to 'off' state
    prevTime = t;                  // Record the time of the last mode change
  }
}

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# SPDX-FileCopyrightText: 2017 Phillip Burgess for Adafruit Industries
#
# SPDX-License-Identifier: MIT

import time

import board
import neopixel

try:
    import urandom as random  # for v1.0 API support
except ImportError:
    import random

numpix = 36  # Number of NeoPixels
pixpin = board.D1  # Pin where NeoPixels are connected
strip = neopixel.NeoPixel(pixpin, numpix, brightness=1.0)

mode = 0  # Current animation effect
offset = 0  # Position of spinner animation
color = [160, 0, 160]  # RGB color - purple
prevtime = time.monotonic()  # Time of last animation mode switch

while True:  # Loop forever...

    if mode == 0:  # Random sparkles - lights just one LED at a time
        i = random.randint(0, numpix - 1)  # Choose random pixel
        strip[i] = color  # Set it to current color
        strip.write()  # Refresh LED states
        # Set same pixel to "off" color now but DON'T refresh...
        # it stays on for now...bot this and the next random
        # pixel will be refreshed on the next pass.
        strip[i] = [0, 0, 0]
        time.sleep(0.008)  # 8 millisecond delay
    elif mode == 1:  # Spinny wheel (4 LEDs on at a time)
        for i in range(numpix):  # For each LED...
            if ((offset + i) & 7) < 2:  # 2 pixels out of 8...
                strip[i] = color  # are set to current color
            else:
                strip[i] = [0, 0, 0]  # other pixels are off
        strip.write()  # Refresh LED states
        time.sleep(0.08)  # 80 millisecond delay
        offset += 1  # Shift animation by 1 pixel on next frame
        if offset >= 8:
            offset = 0
    # Additional animation modes could be added here!

    t = time.monotonic()  # Current time in seconds
    if (t - prevtime) >= 8:  # Every 8 seconds...
        mode += 1  # Advance to next mode
        if mode > 1:  # End of modes?
            mode = 0  # Start over from beginning
        strip.fill([0, 0, 0])  # Turn off all pixels
        prevtime = t  # Record time of last mode change