#include "Adafruit_TinyUSB.h"
int num;
void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  Serial.println("Enter LED delay number in seconds: ");
  while (Serial.available() == 0) {}
  num = Serial.parseInt();
  digitalWrite(LED_BUILTIN, HIGH);
  delay(num*1000); 
  digitalWrite(LED_BUILTIN, LOW);
  delay(num*1000); 
}