gistfile1.ino

#include <CapacitiveSensor.h>

CapacitiveSensor capSensor = CapacitiveSensor(4,2);

boolean isOn = false;

long prevTimeChanged = 0;

void setup() {
  // open a serial connection
  Serial.begin(9600);
  pinMode(13, OUTPUT);
}

void loop() {
  long sensorValue = capSensor.capacitiveSensor(300);

  Serial.println(sensorValue); 

  long currentTime = millis();

  if (sensorValue > 50.0 && (currentTime - prevTimeChanged > 2000)) {
    
     prevTimeChanged = currentTime;
    
    if (isOn) {
      isOn = false;
      digitalWrite(13, LOW);
    } 
    else {
      isOn = true;
      digitalWrite(13, HIGH);
    }

  }

  delay(10);
}