diff --git a/pro_micro/pro_micro.ino b/pro_micro/pro_micro.ino
index ecb55b2..676188e 100644
--- a/pro_micro/pro_micro.ino
+++ b/pro_micro/pro_micro.ino
@@ -25,28 +25,36 @@ Auch hilfreich:
 
 */
 
-int RXLED = 17;  // The RX LED has a defined Arduino pin
-// The TX LED was not so lucky, we'll need to use pre-defined
-// macros (TXLED1, TXLED0) to control that.
-// (We could use the same macros for the RX LED too -- RXLED1,
-//  and RXLED0.)
+#include "Keyboard.h"
+
+const int RXLED = 17;  // The RX LED has a defined Arduino pin
+const int buttonPin = 2;
+int buttonState = 0;
+int prevButtonState = HIGH;
 
 void setup() {
+  Serial.println("Hello Keyboard World");
   pinMode(RXLED, OUTPUT);  // Set RX LED as an output
-  // TX LED is set as an output behind the scenes
-  
+  pinMode(buttonPin, INPUT_PULLUP);
+  digitalWrite(buttonPin, HIGH);
   Serial.begin(9600); //This pipes to the serial monitor
-  Serial1.begin(9600); //This is the UART, pipes to sensors attached to board
+  Keyboard.begin();
 }
 
 void loop() {
-  Serial.println("Hello world");  // Print "Hello World" to the Serial Monitor
-  Serial1.println("Hello!");  // Print "Hello!" over hardware UART
-  
-  digitalWrite(RXLED, LOW);   // set the LED on
-  TXLED0; //TX LED is not tied to a normally controlled pin
-  delay(3000);              // wait for a second
-  digitalWrite(RXLED, HIGH);    // set the LED off
-  TXLED1;
-  delay(3000);              // wait for a second
+  buttonState = digitalRead(buttonPin);
+  if ((buttonState != prevButtonState) && (buttonState == HIGH)) {
+    Serial.println("Now pressing button");
+    
+    // Here starts the output action
+    //Keyboard.press(KEY_LEFT_GUI); // Command key in Mac, use KEY_LEFT_CTRL for Pc
+    Keyboard.press('v');
+    delay(100);
+    Keyboard.releaseAll(); // This is important after every Keyboard.press it will continue to be pressed
+
+    digitalWrite(RXLED, LOW); // set the LED on
+    delay(300);
+    digitalWrite(RXLED, HIGH); // set the LED off
+  }
+  prevButtonState = buttonState;
 }
\ No newline at end of file