added examples folder and .py files

examples/acceleration.py

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+import time
+from adafruit_circuitplayground.express import cpx
+
+while True:
+    x, y, z = cpx.acceleration
+    print(x, y, z)
+
+    time.sleep(0.1)

examples/pixels.py

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+# CircuitPython demo - NeoPixel
+
+import time
+from adafruit_circuitplayground.express import cpx
+
+
+# The number of pixels in the strip
+numpix = 10
+
+def wheel(pos):
+    # Input a value 0 to 255 to get a color value.
+    # The colours are a transition r - g - b - back to r.
+    if (pos < 0) or (pos > 255):
+        return (0, 0, 0)
+    if pos < 85:
+        return (int(pos * 3), int(255 - (pos*3)), 0)
+    elif pos < 170:
+        pos -= 85
+        return (int(255 - pos*3), 0, int(pos*3))
+    #else:
+    pos -= 170
+    return (0, int(pos*3), int(255 - pos*3))
+
+def rainbow_cycle(wait):
+    for j in range(255):
+        for i in range(cpx.pixels.n):
+            idx = int((i * 256 / len(cpx.pixels)) + j)
+            cpx.pixels[i] = wheel(idx & 255)
+        cpx.pixels.show()
+        time.sleep(wait)
+
+cpx.pixels.auto_write = False
+cpx.pixels.brightness = 0.3
+while True:
+    rainbow_cycle(0.001)    # rainbowcycle with 1ms delay per step

examples/shake.py

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+from adafruit_circuitplayground.express import cpx
+
+while True:
+    if cpx.shake(shake_threshold=20):
+        print("Shake detected!")

examples/tapdetect.py

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+from adafruit_circuitplayground.express import cpx
+
+# Set to check for single-taps.
+cpx.detect_taps = 1
+tap_count = 0
+
+# We're looking for 2 single-taps before moving on.
+while tap_count < 2:
+    if cpx.tapped:
+        tap_count += 1
+print("Reached 2 single-taps!")
+
+# Now switch to checking for double-taps
+tap_count = 0
+cpx.detect_taps = 2
+
+# We're looking for 2 double-taps before moving on.
+while tap_count < 2:
+    if cpx.tapped:
+        tap_count += 1
+print("Reached 2 double-taps!")
+print("Done.")

examples/tapdetectsimple.py

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+from adafruit_circuitplayground.express import cpx
+
+cpx.detect_taps = 1
+
+while True:
+    if cpx.tapped:
+        print("Single tap detected!")

examples/tone.py

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+from adafruit_circuitplayground.express import cpx
+
+while True:
+    if cpx.button_a:
+        cpx.start_tone(262)
+    elif cpx.button_b:
+        cpx.start_tone(294)
+    else:
+        cpx.stop_tone()

examples/touched.py

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+from adafruit_circuitplayground.express import cpx
+
+while True:
+    if cpx.touch_A1:
+        print('Touched pad A1')
+    if cpx.touch_A2:
+        print('Touched pad A2')
+    if cpx.touch_A3:
+        print('Touched pad A3')
+    if cpx.touch_A4:
+        print('Touched pad A4')
+    if cpx.touch_A5:
+        print('Touched pad A5')
+    if cpx.touch_A6:
+        print('Touched pad A6')
+    if cpx.touch_A7:
+        print('Touched pad A7')