int a1=21;
int b1=19;
int c1=32;
int a2=33;
int b2=25;
int c2=26;
int s1=12;
int s2=2;
int s3=15;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(a1,OUTPUT);
  pinMode(b1,OUTPUT);
  pinMode(c1,OUTPUT);
  pinMode(a2,OUTPUT);
  pinMode(b2,OUTPUT);
  pinMode(c2,OUTPUT);
  pinMode(12,INPUT);
  pinMode(5,INPUT);
  pinMode(15,INPUT);
}
void loop() 
{
  // put your main code here, to run repeatedly:
  digitalWrite(a1, HIGH);
  digitalWrite(a2, HIGH);
  delay(10000); // this speeds up the simulation
  digitalWrite(a1, LOW);
  digitalWrite(a2, LOW);
  delay(500);
  digitalWrite(b1, HIGH);
  digitalWrite(b2, HIGH);
  delay(10000); 
  digitalWrite(b1, LOW);
  digitalWrite(b2, LOW);
  delay(500); 
  digitalWrite(c1, HIGH);
  digitalWrite(c2, HIGH);
  delay(10000);
  digitalWrite(c1, LOW);
  digitalWrite(c2, LOW);
  delay(500);
}