diff --git a/testaukset.py b/testaukset.py
index d4ea429..0ea1522 100644
--- a/testaukset.py
+++ b/testaukset.py
@@ -4,6 +4,13 @@ from grove.gpio import GPIO
 led = GPIO(5, GPIO.OUT)
 button = GPIO(6, GPIO.IN)
 
+# create PWM instance
+pwm = GPIO.PWM(12, 10) # pin 12
+pwm.start(0) 
+# 1000 Hz sound
+pwm.ChangeFrequency(1000)
+pwm.ChangeDutyCycle(100)
+
 while True:
     if button.read():
         led.write(1)