Add NeoPixel control script for Crickit FeatherWing

This script drives NeoPixels on the Crickit FeatherWing, implementing color fill, color chase, and rainbow cycle effects.

Author: TheKitty

Crickits/Make_It_Glow_With_Crickit/Crickit-Feather-NeoPixels/code.py

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+# SPDX-FileCopyrightText: 2018 Kattni Rembor for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+# Drive NeoPixels on the NeoPixels Block on Crickit FeatherWing
+import time
+from rainbowio import colorwheel
+from adafruit_crickit import crickit
+from adafruit_seesaw.neopixel import NeoPixel
+
+num_pixels = 30  # Number of pixels driven from Crickit NeoPixel terminal
+
+# The following line sets up a NeoPixel strip on Seesaw pin 20 for Feather
+pixels = NeoPixel(crickit.seesaw, 20, num_pixels)
+
+def color_chase(color, wait):
+    for i in range(num_pixels):
+        pixels[i] = color
+        time.sleep(wait)
+        pixels.show()
+    time.sleep(0.5)
+
+def rainbow_cycle(wait):
+    for j in range(255):
+        for i in range(num_pixels):
+            rc_index = (i * 256 // num_pixels) + j
+            pixels[i] = colorwheel(rc_index & 255)
+        pixels.show()
+        time.sleep(wait)
+
+RED = (255, 0, 0)
+YELLOW = (255, 150, 0)
+GREEN = (0, 255, 0)
+CYAN = (0, 255, 255)
+BLUE = (0, 0, 255)
+PURPLE = (180, 0, 255)
+
+while True:
+    print("fill")
+    pixels.fill(RED)
+    pixels.show()
+    # Increase or decrease to change the speed of the solid color change.
+    time.sleep(1)
+    pixels.fill(GREEN)
+    pixels.show()
+    time.sleep(1)
+    pixels.fill(BLUE)
+    pixels.show()
+    time.sleep(1)
+
+    print("chase")
+    color_chase(RED, 0.1)  # Increase the number to slow down the color chase
+    color_chase(YELLOW, 0.1)
+    color_chase(GREEN, 0.1)
+    color_chase(CYAN, 0.1)
+    color_chase(BLUE, 0.1)
+    color_chase(PURPLE, 0.1)
+
+    print("rainbow")
+    rainbow_cycle(0)  # Increase the number to slow down the rainbow