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

  delay(10);
}