1  """
 2  This plays various animations
 3  and then draws random pixels at random locations
 4  """
 5  
 6  from time import sleep
 7  import random
 8  from adafruit_featherwing import dotstar_featherwing
 9  
10  dotstar = dotstar_featherwing.DotStarFeatherWing()
11  
12  # HELPERS
13  # a random color 0 -> 224
14  def random_color():
15      return random.randrange(0, 8) * 32
16  
17  
18  # Fill screen with random colors at random brightnesses
19  for i in range(0, 5):
20      dotstar.fill((random_color(), random_color(), random_color()))
21      dotstar.brightness = random.randrange(2, 10) / 10
22      sleep(0.2)
23  
24  # Set display to 30% brightness
25  dotstar.brightness = 0.3
26  
27  # Create a gradiant drawing each pixel
28  for x in range(0, dotstar.columns):
29      for y in range(dotstar.rows - 1, -1, -1):
30          dotstar[x, y] = (y * 42, 255, y * 42, 1)
31  
32  # Rotate everything left 36 frames
33  for i in range(0, 36):
34      dotstar.shift_down(True)
35  
36  # Draw dual gradiant and then update
37  dotstar.auto_write = False
38  for y in range(0, dotstar.rows):
39      for x in range(0, 6):
40          dotstar[x, y] = (y * 84, x * 42, x * 42, 1)
41      for x in range(6, 12):
42          dotstar[x, y] = (255 - (y * 84), 255 - ((x - 6) * 42), 255 - ((x - 6) * 42), 1)
43  
44  # Rotate everything left 36 frames
45  for i in range(0, 36):
46      dotstar.shift_left(True)
47      dotstar.shift_up(True)
48      dotstar.show()
49  dotstar.auto_write = True
50  
51  # Shift pixels without rotating for an animated screen wipe
52  for i in range(0, 6):
53      dotstar.shift_down()
54  
55  # Show pixels in random locations of random color
56  # Bottom left corner is (0,0)
57  while True:
58      x = random.randrange(0, dotstar.columns)
59      y = random.randrange(0, dotstar.rows)
60      dotstar[x, y] = (random_color(), random_color(), random_color())
61      sleep(0.1)