#include <CapacitiveSensor.h>

CapacitiveSensor pads[] = {
  {2, 3}, {2, 4}, {2, 5},
  {2, 6}, {2, 7}, {2, 8},
  {2, 9}, {2, 10}, {2, 11},
  {2, 12},
};
#define array_len(a) (sizeof(a)/sizeof*(a))

void setup() {
  Serial.begin(9600);
  pinMode(13, OUTPUT);
}

void loop() {
  unsigned long start = millis();
  bool touched = false;
  for (int i = 0; i < array_len(pads); ++i) {
    long val = pads[i].capacitiveSensor(30);
    Serial.print(i);
    Serial.print(": ");
    Serial.print(val);
    Serial.print("\t");
    if (val > 200) {
      touched = true;
      break;
    }
  }
  Serial.println();
  Serial.println(millis() - start);
  digitalWrite(13, touched);
}