diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..08df484
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,16 @@
+#include "Arduino.h"
+
+#ifndef LED_BUILTIN
+#define LED_BUILTIN 13
+#endif
+
+void setup() {
+  pinMode(LED_BUILTIN, OUTPUT);
+}
+
+void loop() {
+  digitalWrite(LED_BUILTIN, HIGH);
+  delay(1000);
+  digitalWrite(LED_BUILTIN, LOW);
+  delay(1000);
+}