adding Arduino code

blinky_program/blinky_program.ino

@@ -0,0 +1,19 @@
+void setup() {
+  // initialize digital pin LED_BUILTIN as an output.
+  pinMode(13, OUTPUT);
+  pinMode(12, OUTPUT);
+  pinMode(11, OUTPUT);
+  pinMode(10, OUTPUT);
+  pinMode(9, OUTPUT);
+}
+
+
+// the loop function runs over and over again forever
+void loop() {
+  delay(50); // milliseconds
+  int LED_pin = 13;
+  for (int LED_pin = 13; LED_pin >=9; LED_pin--) {
+    if (random(0, 4) >= 3) digitalWrite(LED_pin, HIGH); else digitalWrite(LED_pin, LOW);
+    //digitalWrite(LED_pin, HIGH);
+  }
+}