const int ledDriverPin = 13;  // Pin for LED driver
const int microscopePin = 7;  // Pin for microscope activation
const int audioPin = 8;      // Pin for audio stimulus

int trialCount = 20;            // Number of trials

void setup() {
  pinMode(microscopePin, OUTPUT);
  pinMode(ledDriverPin, OUTPUT);
  pinMode(audioPin, OUTPUT);

  Serial.begin(9600); // to monitor the progress of the code
}

void loop() {
  for (int trial = 1; trial <= trialCount; trial++) {
    Serial.print("Trial #");
    Serial.println(trial);

    // Activate microscope acquisition at the beginning of each trial
    digitalWrite(microscopePin, HIGH);
    
    if (trial % 2 == 1) {
      // Odd trial: Activate LED and audio stimulus after a 20-second delay
      delay(20000); // 20-second delay
      digitalWrite(ledDriverPin, HIGH);
      digitalWrite(audioPin, HIGH);
      delay(500);
      Serial.println("LED and audio stimulus done.");
      digitalWrite(ledDriverPin, LOW); // Turn off the LED
      digitalWrite(audioPin, LOW); // Turn off the audio stimulus
      delay(60000); // Have microscope acquisition running for another 60 sec
      Serial.println("Microscope acquisition done.");

      
    } else {
      // Even trial: Activate audio stimulus after a 20-second delay, no LED
      delay(20000); // 20-second delay
      
      // Activate audio stimulus
      digitalWrite(audioPin, HIGH);
      delay(500);  // Adjust this delay if needed for your audio stimulus
      Serial.println("Audio stimulus done.");
      digitalWrite(audioPin, LOW); // Turn off the audio stimulus
      delay(60000); // Have microscope acquisition running for another 60 sec
      Serial.println("Microscope acquisition done.");
    }
    
    // Turn off microscope acquisition at the end of each trial
    digitalWrite(microscopePin, LOW);
    digitalWrite(audioPin, LOW);
    digitalWrite(ledDriverPin, LOW);

  }
}