Merge pull request adafruit#1146 from jedgarpark/protest-sign

first commit grahic protest sign code and sample graphics

Author: ladyada

RGB_Matrix_Protest_Sign/images/BLM.bmp

@@ -0,0 +1,34 @@
+import board
+import displayio
+import framebufferio
+import rgbmatrix
+from adafruit_slideshow import SlideShow
+
+displayio.release_displays()
+matrix = rgbmatrix.RGBMatrix(
+    width=64,
+    height=32,
+    bit_depth=5,
+    rgb_pins=[board.D6, board.D5, board.D9, board.D11, board.D10, board.D12],
+    addr_pins=[board.A5, board.A4, board.A3, board.A2],
+    clock_pin=board.D13,
+    latch_pin=board.D0,
+    output_enable_pin=board.D1,
+)
+
+display = framebufferio.FramebufferDisplay(matrix, auto_refresh=True)
+
+slideshow = SlideShow(
+    display,
+    backlight_pwm=None,
+    folder="/images",
+    loop=True,
+    order=0,
+    fade_effect=False,
+    dwell=8,
+    auto_advance=True,
+)
+
+
+while slideshow.update():
+    pass