Various bug fixes
diff --git a/examples/ladder-board.py b/examples/ladder-board.py
new file mode 100644
index 0000000..de4542f
--- /dev/null
+++ b/examples/ladder-board.py
@@ -0,0 +1,27 @@
+import wiringpi2 as wiringpi
+INPUT = 0
+OUTPUT = 1
+LOW = 0
+HIGH = 1
+BUTTONS = [13,12,10,11]
+LEDS = [0,1,2,3,4,5,6,7,8,9]
+PUD_UP = 2
+
+wiringpi.wiringPiSetup()
+
+for button in BUTTONS:
+ wiringpi.pinMode(button,INPUT)
+ wiringpi.pullUpDnControl(button,PUD_UP)
+
+for led in LEDS:
+ wiringpi.pinMode(led,OUTPUT)
+
+while 1:
+ for index,button in enumerate(BUTTONS):
+ button_state = wiringpi.digitalRead(button)
+ first_led = LEDS[index*2]
+ second_led = LEDS[(index*2)+1]
+ #print str(button) + ' ' + str(button_state)
+ wiringpi.digitalWrite(first_led,1-button_state)
+ wiringpi.digitalWrite(second_led,1-button_state)
+ wiringpi.delay(20)