String inputString = "";
int blinkDelay = 1000;
int LEDPin = 2;
void setup() {
    pinMode(LEDPin, OUTPUT);
    Serial.begin(115200);
}
void loop() {
    if (Serial.available() > 0) {
        inputString = Serial.readString();
        blinkDelay = inputString.toInt();
    }
    digitalWrite(LEDPin, HIGH);
    delay(blinkDelay);
    digitalWrite(LEDPin, LOW);
    delay(blinkDelay);
}