diff --git a/demo.py b/demo.py
new file mode 100644
index 0000000..6510062
--- /dev/null
+++ b/demo.py
@@ -0,0 +1,32 @@
+from machine import Pin
+import utime
+
+trigger = Pin(3, Pin.OUT)
+echo = Pin(2, Pin.IN)
+
+sound = 340 * 100  # m/s * centi = cm/s
+
+
+def ultra():
+    trigger.low()
+    utime.sleep_us(2)
+    trigger.high()
+    utime.sleep_us(10)
+    trigger.low()
+
+    # echo goes high as soon as sound wave is sent
+    #   and returns to low once sound gets back
+    while echo.value() == 0:
+        sent_time = utime.ticks_us()  # us
+
+    while echo.value() == 1:
+        received_time = utime.ticks_us()  # us
+
+    delta_time = received_time - sent_time  # us
+    distance = delta_time / 1_000_000 * sound / 2
+    print("The distance from object is", distance, "cm")
+
+
+while True:
+    ultra()
+    utime.sleep(0.1)