// set pin numbers
const int touchPin = 4;
const int firstLedPin = 18;
const int secondLedPin = 21;

// change with your threshold value
const int threshold = 25;
// variable for storing the touch pin value
int touchValue;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  delay(1000); // give me time to bring up serial monitor (1 second)
  pinMode (firstLedPin, OUTPUT);
  pinMode (secondLedPin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  touchValue = touchRead(touchPin);
  Serial.print(touchValue);
  // check if the touchValue is below the threshold
  // if it is, do blink LED
  if (touchValue < threshold){
    Serial.println(" - Blink LED");
    digitalWrite(firstLedPin, HIGH);
    digitalWrite(secondLedPin, LOW);
    delay(500);
    digitalWrite(firstLedPin, LOW);
    digitalWrite(secondLedPin, HIGH);
  }
  else {
    // turn LED off
    digitalWrite(firstLedPin, LOW);
    digitalWrite(secondLedPin, LOW);
    Serial.println(" - LED off");
  }
  delay(500); // this speeds up the simulation
}