Arduino Intro: 4 LEDs 2 Pins, 2 LEDs 1 Pin

Arduino sketch: /* 4 LEDs 2 Pins 1. Turn on the first pair of LEDs and turn off the other pair of LEDS at the same time, for 1 second. 2. Turn off the first pair of LEDs and turn on the other pair of LEDS at the same time, for 1 second. 3. Repeat */ int pinLED1=9,pinLED2=5; void setup() { // put your setup code here, to run once: pinMode(pinLED1,OUTPUT); pinMode(pinLED2,OUTPUT); }