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Maker_Pico_Box/rainbow.py

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+import machine
+import neopixel
+import time
+
+# GP28 pin and number of LEDs
+pin = 28
+num_leds = 8   # change to how many LEDs you have
+
+np = neopixel.NeoPixel(machine.Pin(pin), num_leds)
+
+# Simple color helper
+def set_color(r, g, b):
+    for i in range(num_leds):
+        np[i] = (r, g, b)
+    np.write()
+
+# Demo loop
+while True:
+    set_color(255, 0, 0)  # Red
+    time.sleep(1)
+
+    set_color(0, 255, 0)  # Green
+    time.sleep(1)
+
+    set_color(0, 0, 255)  # Blue
+    time.sleep(1)
+
+    set_color(0, 0, 0)    # Off
+    time.sleep(1)