diff --git a/led_test.py b/led_test.py
new file mode 100644
index 0000000..cd1de81
--- /dev/null
+++ b/led_test.py
@@ -0,0 +1,41 @@
+"""
+LoRa-Training / led_tester - Test the leds connected to the board (called green and red) 
+Copyright (C) 2024  Benjamin Burkhardt
+
+This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""
+
+from machine import Pin
+from time import sleep
+import gc
+
+def run(run_forever=False):
+    green = Pin(26, Pin.OUT)
+    red = Pin(27, Pin.OUT)
+        
+    g = True
+    r = None
+    counter = 0
+
+    while counter < 4 or run_forever:
+        r = g
+        g = not g
+        
+        red.value(r)
+        green.value(g)
+        
+        counter += 1
+        sleep(0.5)
+    
+    if not run_forever:  # do cleanup
+        red.value(0)
+        green.value(0)
+        gc.collect()
+    
+
+if __name__ == "__main__":
+    run(True)
diff --git a/lora_pingpong.py b/lora_pingpong.py
index d080936..b302d01 100644
--- a/lora_pingpong.py
+++ b/lora_pingpong.py
@@ -1,3 +1,15 @@
+"""
+LoRa-Training / lora_pingpong - A simple lora pingpong program for testing reasons
+Copyright (C) 2024  Benjamin Burkhardt
+
+This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""
+
+
 from SX127x import SX127x
 from machine import Pin, SPI
 from time import sleep, time_ns
diff --git a/lora_receiver.py b/lora_receiver.py
index 4da88bc..66735ee 100644
--- a/lora_receiver.py
+++ b/lora_receiver.py
@@ -1,3 +1,15 @@
+"""
+LoRa-Training / led_receiver - listen to all messages sent over LoRa and print them on serial (and LCD) 
+Copyright (C) 2024  Benjamin Burkhardt
+
+This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""
+
+
 from SX127x import SX127x
 from machine import Pin, SPI
 from time import sleep
@@ -63,4 +75,4 @@ def run():
     receive(lora, 7, lcd_connected=True)
 
 if __name__ == '__main__':
-    run()
\ No newline at end of file
+    run()
diff --git a/lora_sender.py b/lora_sender.py
index a370fae..5b778bc 100644
--- a/lora_sender.py
+++ b/lora_sender.py
@@ -1,3 +1,15 @@
+"""
+LoRa-Training / led_sender - Send a simple lora message frequently 
+Copyright (C) 2024  Benjamin Burkhardt
+
+This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""
+
+
 from SX127x import SX127x
 from machine import Pin, SPI
 from time import sleep
@@ -67,4 +79,4 @@ def run():
     send(lora, 7, lcd_connected=True)
 
 if __name__ == '__main__':
-    run()
\ No newline at end of file
+    run()