int In1 = 7;
int In2 = 8;
int ENA = 5;
int SPEED = 255;
int In3 = 4;
int In4 = 6;
int ENB = 2;
int In5 = 10;
int In6 = 9;
int ENA2 = 11;
const int buttonPin = 3;
int stop = 0;


void setup() {
  // if you want to use serial printning
  // you have to do a call to function Serial.begin(baudrate);
  Serial.begin(115200);
  Serial.println("Setup-Start");
  pinMode(In1, OUTPUT);
  pinMode(In2, OUTPUT);
  pinMode(ENA, OUTPUT);
  pinMode(In3, OUTPUT);
  pinMode(In4, OUTPUT);
  pinMode(ENB, OUTPUT);
  pinMode(In5, OUTPUT);
  pinMode(In6, OUTPUT);
  pinMode(ENA2, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);
}


void loop()  {

  // in this case it can be coded much simpler
  // a simple if-condition that checks if the button is pressed 
  // is sufficient because there are so many delays() in this code
  // you would have to hold down the button for more than
  /*  
    delay(1000); 
    delay(2000);
    delay(1000);
    delay(2000); 
    delay(1000);
    delay(1000);
    delay(2000);
    delay(1000);
    delay(2000);
    delay(1000);
    delay(2000);
    ----------
    16 seconds to make it run a second round immidiately
  */  

  if (digitalRead(buttonPin) == LOW ) {
    // Button was pressed
    // Start the code sequence
    Serial.println("Button pressed. Running code...");
    digitalWrite(In1, HIGH);
    digitalWrite(In2, LOW);
    Serial.println("A Motor1 Right");
    delay(1000);

    digitalWrite(In1, LOW);
    digitalWrite(In2, LOW);
    Serial.println("B Motor1 Stop");
    delay(2000);

    digitalWrite(In1, LOW);
    digitalWrite(In2, HIGH);
    Serial.println("C Motor1 Left");
    delay(1000);

    digitalWrite(In1, LOW);
    digitalWrite(In2, LOW);
    Serial.println("D Motor1 Stop");
    delay(2000);
    analogWrite(ENA, SPEED);

    digitalWrite(In3, HIGH);
    digitalWrite(In4, LOW);
    Serial.println("E Motor2 Right");
    delay(1000);

    digitalWrite(In3, LOW);
    digitalWrite(In4, LOW);
    
    digitalWrite(In3, LOW);
    digitalWrite(In4, HIGH);
    Serial.println("F Motor2 Left");
    delay(1000);

    digitalWrite(In3, LOW);
    digitalWrite(In4, LOW);
    Serial.println("G Motor2 Stop");
    delay(2000);

    analogWrite(ENB, SPEED);

    digitalWrite(In5, HIGH);
    digitalWrite(In6, LOW);
    Serial.println("H Motor3 Right");
    delay(1000);

    digitalWrite(In5, LOW);
    digitalWrite(In6, LOW);
    Serial.println("I Motor3 Stop");
    delay(2000);

    digitalWrite(In5, LOW);
    digitalWrite(In6, HIGH);
    Serial.println("J Motor3 Left");
    delay(1000);

    digitalWrite(In5, LOW);
    digitalWrite(In6, LOW);
    Serial.println("K Motor3 Stop");
    delay(2000);

    analogWrite(ENA2, SPEED);

    Serial.println("Code sequence ended.");
    digitalWrite(In1, LOW);
    digitalWrite(In2, LOW);
    digitalWrite(ENA, stop);
    
    digitalWrite(In4, LOW);
    digitalWrite(In5, LOW);
    digitalWrite(ENB, stop);
    
    digitalWrite(In5, LOW);
    digitalWrite(In6, LOW);

    analogWrite(ENA2, stop);
  }
}