// Code from How Fast Does Your Arduino Code Run?
// created Steve Barth 2022.10.25.

void setup()
{
 Serial.begin(115200);
 pinMode(13, OUTPUT);
 digitalWrite(13,LOW);

/*
unsigned long start = millis(); // micros

//*** Call to your function

//myFunction();
//delayMicroseconds(4975);        // delayMicroseconds(4975) = 5000us
//delay(5000);                    // delay(5000) = 4999ms
//delay(5001);                    // delay(5001) = 5000ms
//blink();                        // delay (500+500) = 999ms
loop();                         // delay (500+500) = 999ms

//*** Compute the time it took

unsigned long end = millis();
unsigned long delta = end - start;
Serial.print(delta);
Serial.println(" (micros: us / millis: ms)");
*/

}

/*
void blink()
{
pinMode(13,HIGH);
delay(500);
pinMode(13,LOW);
delay(500);
}
*/

void loop() 
{
  unsigned long pgmStart = micros(); // micros
  
  digitalWrite(13, HIGH);
  delay(5);
  digitalWrite(13, LOW);
  delay(25);

unsigned long pgmEnd = micros();
unsigned long pgmTime = pgmEnd - pgmStart;
Serial.print("program time: ");
Serial.print((pgmTime/1000.)+400);
Serial.println("ms");
delay(400);
}