// turns LED on for one second, then off for one second.


// initialize the digital pin on an output
// Pin 13 has an LED connected
void setup() {
  pinMode(13, OUTPUT);
}

void loop() {
 float led;
 led = random(100, 600);
 digitalWrite(13, HIGH);
 delay(led);
 digitalWrite(13, LOW);
 delay(led);
}