void setup() {
pinMode(2, OUTPUT);
pinMode(4, OUTPUT);
}
void loop() {
digitalWrite(2, HIGH);
digitalWrite(4, LOW);
delay(500);
digitalWrite(2, LOW);
digitalWrite(4, HIGH);
delay(500);
}
void setup() {
pinMode(2, OUTPUT);
pinMode(4, OUTPUT);
}
void loop() {
digitalWrite(2, HIGH);
digitalWrite(4, LOW);
delay(500);
digitalWrite(2, LOW);
digitalWrite(4, HIGH);
delay(500);
}