diff --git a/README.md b/README.md
index 2688574..8602f28 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,2 @@
-Questo e il file di test
\ No newline at end of file
+usa nix-shell rshell per upload file con `cp main.py /pyboard`
+per invece usare lo shell di micropython nix-shell minicom
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..a209aa8
--- /dev/null
+++ b/main.py
@@ -0,0 +1,10 @@
+from machine import Pin, Timer
+
+led = Pin("LED", Pin.OUT)
+tim = Timer()
+def tick(timer):
+    global led
+    led.toggle()
+    
+tim.init(freq=2.5, mode=Timer.PERIODIC, callback=tick)
+