Add more advanced and remote recipes

docs/examples/internet_status_indicator.py

@@ -0,0 +1,14 @@
+from gpiozero import LED, PingServer
+from gpiozero.tools import negated
+from signal import pause
+
+green = LED(17)
+red = LED(18)
+
+google = PingServer('google.com')
+
+green.source = google.values
+green.source_delay = 60
+red.source = negated(green.values)
+
+pause()