Arduino:Portas Digitais

int led = 3;
int time = 500;
void setup() {
 // put your setup code here, to run once:
 pinMode(led, OUTPUT);
 digitalWrite(0, LOW);
 digitalWrite(1, LOW);
}
void loop() {
 digitalWrite(led, HIGH);
 delay(time);
 digitalWrite(led, LOW);
 delay(time);
}