loop first 4 leds

multible_led/platformio.ini

@@ -12,3 +12,4 @@
 platform = atmelavr
 board = uno
 framework = arduino
+monitor_speed = 115200

multible_led/src/main.cpp

@@ -1,18 +1,32 @@
 #include <Arduino.h>
 
-// put function declarations here:
+int ledsCount = 4;
-int myFunction(int, int);
+int ledPins[] = {12,11,10,9};
+
 
 void setup() {
   // put your setup code here, to run once:
-  int result = myFunction(2, 3);
+  Serial.begin(115200);
+  Serial.println("Start Multiple Led");
+  for (int i = 0; i < ledsCount; i++)
+  {
+    pinMode(ledPins[i], OUTPUT);
+  }
+  
 }
 
 void loop() {
   // put your main code here, to run repeatedly:
+  for (int i = 0; i < ledsCount; i++)
+  {
+    digitalWrite(ledPins[i], HIGH);
+    delay(50);
+    digitalWrite(ledPins[i], LOW);
+  }
+  for (int i = ledsCount -1; i >= 0; i--)
+  {
+    digitalWrite(ledPins[i], HIGH);
+    delay(50);
+    digitalWrite(ledPins[i], LOW);    
   }
-
-// put function definitions here:
-int myFunction(int x, int y) {
-  return x + y;
 }