#define WAIT_TIME  1000UL

int pins[] = {A0, A1, A2, A3, A4, A5};
int i;
unsigned long currTime;  // non-blocking timer

void setup() {
  Serial.begin(9600);
  currTime = millis();
}

void loop() {
  if (millis() - currTime >= WAIT_TIME) {  // non-blocking time delay
    // Serial.println();
    Serial.print("[");
    for (i = 0; i < sizeof(pins)/2; i++) {
      Serial.print(analogRead(pins[i]));
      if (i != sizeof(pins)/2 - 1) {
        Serial.print(", ");
      }
    }
    Serial.println("]");
    currTime = millis();    
  }

}