int freq = 100;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  // initialize digital pin LED_BUILTIN as an output.
  pinMode(14, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation

  // blink my Light
  // and get a new value back at the same line
  freq = blink_light(freq);
  Serial.println(freq);

}

int blink_light(int delay_time){

  digitalWrite(14, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(delay_time);                       // wait for a second
  digitalWrite(14, LOW);    // turn the LED off by making the voltage LOW
  delay(delay_time);                       // wait for a second
 
  return delay_time + 10;

}