blink #arduino script modified to read blink interval from serial port

Blink_interval_serial.ino

/*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.
  But, the blink interval can be modified via serial monitor. Check out
  Tools->Serial Monitor menu which is enabled after connecting your board via USB.
  
  This example code is in the public domain.
 */

// Pin 13 has an LED connected on most Arduino boards.
// give it a name:
int led = 13;

// default interval to blink
int interval = 1000;

// the setup routine runs once when you press reset:
void setup() {
    // initialize the digital pin as an output.
    pinMode(led, OUTPUT);
    Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
    digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
    if (Serial.available() > 0) {
        // accept interval specified via serial monitor
        interval = Serial.readString().toInt();
        // show the modified interval to the user via serial monitor
        Serial.println(interval);
    }
  
    delay(interval);        // wait for a second
    digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
    delay(interval);        // wait for a second
}