int pinArray[] = {13, 12, 11, 3, 2, 1};
int count = 0;
int timer = 100;
void setup(){
// we make all the declarations at once
for (count=0;count<6;count++) {
pinMode(pinArray[count], OUTPUT);
}
}
void loop() {
for (count=0;count<6;count++) {
digitalWrite(pinArray[count], HIGH);
delay(timer);
digitalWrite(pinArray[count], LOW);
delay(timer);
}
for (count=5;count>=0;count--) {
digitalWrite(pinArray[count], HIGH);
delay(timer);
digitalWrite(pinArray[count], LOW);
delay(timer);
}
}