---

int delayT = 3500 / 5;
void setup() {
  // put your setup code here, to run once:
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(2,HIGH);
delay(delayT / 2);
digitalWrite(2,LOW);
delay(delayT / 2);
digitalWrite(3,HIGH);
delay(delayT / 2);
digitalWrite(3,LOW);
delay(delayT / 2);
digitalWrite(4,HIGH);
delay(delayT / 2);
digitalWrite(4,LOW);
delay(delayT / 2);
digitalWrite(5,HIGH);
delay(delayT / 2);
digitalWrite(5,LOW);
delay(delayT / 2);
digitalWrite(6,HIGH);
delay(delayT / 2);
digitalWrite(6,LOW);
delay(delayT / 2);

}