adding working code, changing to datetime from CRON

Circadian_Pi_Desk_Light/Circadian_Pi_Desk_Light.py

@@ -0,0 +1,28 @@
+import board
+import neopixel
+import sys
+import datetime
+
+pi_pin = board.D18
+numpix = 144
+brightness = 1.0
+pixels = neopixel.NeoPixel(pi_pin, numpix, brightness=brightness) # Raspberry Pi wiring!
+
+# valid argument check and color assignment
+# morning == blue
+# night == red
+# off == all LEDs off
+if len(sys.argv) == 2:
+    if sys.argv[1] == "morning" :
+        color = (0, 0, 255)
+    elif sys.argv[1] == "night" :
+        color = (255, 0, 0)
+    elif sys.argv[1] == "day" :
+        color = (255, 255, 255)
+    elif sys.argv[1] == "off" :
+        color = (0, 0, 0)
+
+    pixels.fill(color)
+
+else:
+    print("valid arguments are morning, night or off")