const int trigPins[] = {2, 4, 6, 8};
const int echoPins[] = {3, 5, 7, 9};
const String Colors[] = {"C", "M", "Y", "K"};
const int numColors = 4;


long duration[numColors];
int distance[numColors];

void checkDistance() {
  for (int color = 0; color < numColors; color++) {
    digitalWrite(trigPins[color], LOW);
    delayMicroseconds(2);
    digitalWrite(trigPins[color], HIGH);
    delayMicroseconds(1);
    digitalWrite(trigPins[color], LOW);
    duration[color] = pulseIn(echoPins[color], HIGH);
    distance[color] = duration[color] * 0.034 / 2;
    Serial.print(Colors[color]);
    Serial.println(distance[color]);

  }
}


void setup() {
  for (int color = 0; color < numColors; color++) {
    pinMode(trigPins[color], OUTPUT);
    pinMode(echoPins[color], INPUT);

  }
  Serial.begin(9600);
}

void loop() {
  checkDistance();

  delay(50); // Delay for one second between measurements
}