#include <Arduino.h>

void setup()
{
  // put your setup code here, to run once:
  pinMode(LED_BUILTIN, OUTPUT);
}

int a = 1000;
int b = 100;
void loop()
{
  // put your main code here, to run repeatedly:
  digitalWrite(LED_BUILTIN, HIGH);
  delay(a);
  digitalWrite(LED_BUILTIN, LOW);
  delay(b);
}