/*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.
 
 
 you connect the leds to 
 pin 13 and gnd

connect another to 
 pin 3, pin 4
 
  This example code is in the public domain.
 */
 
int led13 = 13;
int led3 = 3;
int led4 = 4;

// the setup routine runs once when you press reset:
void setup() {                
  // initialize the digital pin as an output.
  pinMode(led13, OUTPUT);
  pinMode(led3, OUTPUT);     
  pinMode(led4, OUTPUT);     
  digitalWrite(led4,LOW);
}

// the loop routine runs over and over again forever:
void loop() {
  digitalWrite(led13, HIGH);   // turn the LED on (HIGH is the voltage level)
  digitalWrite(led3, HIGH);
  delay(1000);               // wait for a second
  digitalWrite(led13, LOW);    // turn the LED off by making the voltage LOW
  digitalWrite(led3, LOW);
  delay(1000);               // wait for a second
}