Create leds.py

Code to turn all LEDs on for 0.5 seconds, and off for 0.5 second, generating a flashing array of LEDs with an appropriate flash rate.

leds.py

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+import piface.pfio as pfio
+
+pfio.init()
+
+while True:
+
+    # turn LED pins 1 to 10 on
+    pfio.digital_write(1, 1)
+    pfio.digital_write(2, 1)
+    pfio.digital_write(3, 1)
+    pfio.digital_write(4, 1)
+    pfio.digital_write(5, 1)
+    pfio.digital_write(6, 1)
+    pfio.digital_write(7, 1)
+    pfio.digital_write(8, 1)
+    pfio.digital_write(9, 1)
+    pfio.digital_write(10, 1)
+
+    time.sleep(0.5) # LEDs stay on for half a second
+
+    # turn LED pins 1 to 10 off
+    pfio.digital_write(1, 0)
+    pfio.digital_write(2, 0)
+    pfio.digital_write(3, 0)
+    pfio.digital_write(4, 0)
+    pfio.digital_write(5, 0)
+    pfio.digital_write(6, 0)
+    pfio.digital_write(7, 0)
+    pfio.digital_write(8, 0)
+    pfio.digital_write(9, 0)
+    pfio.digital_write(10, 0)
+
+    time.sleeo(0.5) # LEDs stay off for half a second