Moved all demo programs into subfolder

DemoPrograms/Demo_Pi_LEDs.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+import sys
+if sys.version_info[0] >= 3:
+    import PySimpleGUI as sg
+else:
+    import PySimpleGUI27 as sg
+# GUI for switching an LED on and off to GPIO14
+
+# GPIO and time library:
+import RPi.GPIO as GPIO
+import time
+
+# determine that GPIO numbers are used:
+GPIO.setmode(GPIO.BCM)
+GPIO.setup(14, GPIO.OUT)
+
+def SwitchLED():
+    varLEDStatus = GPIO.input(14)
+    varLedStatus = 0
+    if varLedStatus == 0:
+        GPIO.output(14, GPIO.HIGH)
+        return "LED is switched ON"
+    else:
+        GPIO.output(14, GPIO.LOW)
+        return "LED is switched OFF"
+
+
+def FlashLED():
+    for i in range(5):
+        GPIO.output(14, GPIO.HIGH)
+        time.sleep(0.5)
+        GPIO.output(14, GPIO.LOW)
+        time.sleep(0.5)
+
+layout = [[sg.T('Raspberry Pi LEDs')],
+           [sg.T('', size=(14, 1), key='output')],
+           [sg.Button('Switch LED')],
+           [sg.Button('Flash LED')],
+           [sg.Exit()]]
+
+window = sg.Window('Raspberry Pi GUI', grab_anywhere=False).Layout(layout)
+
+while True:
+    event, values = window.Read()
+    if event is None:
+        break
+
+    if event is 'Switch LED':
+        window.FindElement('output').Update(SwitchLED())
+    elif event is 'Flash LED':
+        window.FindElement('output').Update('LED is Flashing')
+        window.Refresh()
+        FlashLED()
+        window.FindElement('output').Update('')
+
+window.Close()
+sg.Popup('Done... exiting')