void setup() {
if (!Serial) Serial.println("serial is not ok");
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
// put your setup code here, to run once:
}
void loop() {
digitalWrite(3, HIGH);
delay(100
);
digitalWrite(3, LOW);
delay(100);
digitalWrite(5, HIGH);
delay(100);
digitalWrite(5, LOW);
;
// put your main code here, to run repeatedly:
}