xmas_tree/example_2.py

   1 import tree
   2
   3 # Some constants to identify each LED
   4 L0 = 1
   5 L1 = 2
   6 L2 = 4
   7 L3 = 8
   8 L4 = 16
   9 L5 = 32
  10 L6 = 64
  11 ALL = 1+2+4+8+16+32+64
  12 NO_LEDS = 0
  13
  14 tree.setup() # you must always call setup() first!
  15
  16 # Pattern: two or three LEDs are on at the same time.
  17 # Note that each pair is on for 0.4 seconds
  18
  19 for i in range(7): # repeat the pattern 7 times
  20   tree.leds_on_and_wait(L1+L4, 0.4)      # LED 1 and LED 4
  21   tree.leds_on_and_wait(L5+L3+L0, 0.4) # LEDs 5, 3 and 0
  22   tree.leds_on_and_wait(L2+L6, 0.4)      # LEDs 2 and 6
  23   tree.leds_on_and_wait(L5+L3+L0, 0.4) # LEDs 5, 3 and 0
  24
  25
  26 tree.all_leds_off() # extinguish all LEDs
  27
  28 # All done!
  29 tree.cleanup() # call cleanup() at the end
  30
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