/* STM32 Blue Pill project using the STM32 Arduino Core (stm32duino) */

void setup() {
   pinMode(A1, OUTPUT);
   pinMode(A2, OUTPUT);
   pinMode(A3, OUTPUT);
}

void loop() {
  digitalWrite(A3, HIGH);
  delay(1000);
  digitalWrite(A3, HIGH);
  digitalWrite(A2, HIGH);
  delay(1000);
  digitalWrite(A3, LOW);
  digitalWrite(A2, LOW);
  digitalWrite(A1,HIGH);
  delay(1000);
  digitalWrite(A1,HIGH);
  digitalWrite(A2, HIGH);
  delay(1000);
  digitalWrite(A1,LOW);
  digitalWrite(A2, LOW);
  
}