//faster blinking led

int x = 1000;
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(13, OUTPUT);
  int x = 1000;
}

// the loop function runs over and over again forever
void loop() {
  
  digitalWrite(LED_BUILTIN, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(x);                      // wait for a second
  digitalWrite(LED_BUILTIN, LOW);   // turn the LED off by making the voltage LOW
  delay(x);
  x= x-100;
  if(x==0){
    x=1000;
  }                      // wait for a second
}