const int ledPin = 13; 
const int botonPin = 2;

void setup() {
    pinMode(ledPin, OUTPUT); 
    pinMode(botonPin, INPUT);
}

void loop() {
    if (digitalRead(botonPin) == HIGH) { 
        for (int i = 0; i < 8; i++) { 
            digitalWrite(ledPin, HIGH); 
            delay(250);               
            digitalWrite(ledPin, LOW);  
            delay(250);               
        }
    }
}