diff --git a/interrupt/external.py b/interrupt/external.py
new file mode 100644
index 0000000..c39e9aa
--- /dev/null
+++ b/interrupt/external.py
@@ -0,0 +1,17 @@
+from machine import Pin
+from time import sleep
+
+led = Pin(2, Pin.OUT)
+
+def callback(p):
+    print('pin change', p, p.value())
+    sleep(0.1)
+    
+button1 = Pin(13, Pin.IN)
+button1.irq(trigger=Pin.IRQ_FALLING, handler=callback)
+
+button2 = Pin(14, Pin.IN)
+button2.irq(trigger=Pin.IRQ_FALLING, handler=callback)
+
+while True:
+    pass