/*
      short push toggle led on or off
      long push makes it blink
    */
    
    int Led = 13;
    int Button = 7;
    int lastVal = LOW;
    int state = 0; 
    int debug = 1;
    int onTime = 0;
    int T = 100; // 100ms  10Hz
    
    int ledOnTime = 0;
    int ledState = LOW;
    
    void blink()
    {
      if(state == 0)
      {
        ledState = LOW;
      }
      else if(state == 1)
      {
        ledState = HIGH;
      } 
      else if(state == 2)
      {
        int time = millis();
        int delta = time-ledOnTime;
        if(delta>T)
        {
          ledOnTime = time; // reset time point
          if(ledState == LOW) // toggle state
          {
            ledState = HIGH;
          }
          else
          {
            ledState = LOW;
          }
        }
      } 
    
      digitalWrite(Led, ledState);
    }
    
    void setup()
    {
      if(debug)
      {      
        Serial.begin(9600);
      }
      pinMode(Button, INPUT);
      pinMode(Led, OUTPUT);
    }
    
    void loop()
    {
      int val = digitalRead(Button);
    
      if(lastVal != val) // changed
      {  
        if(lastVal != val && val == LOW) // falling front
        {    
          int offTime = millis();
          int delta = offTime-onTime;
    
          if(delta>1000)
          {
            state = 2;
          }
          else
          {
            // toggle state
            if(state == 0)
            {
              state = 1;
            }
            else if(state == 1)
            {
              state = 0;
            }
            else
            {
              state = 0;
            }
          }
    
          if(debug)
          {      
            Serial.println(state);    
          }
        }
        else // rising front
        {
          onTime = millis();
        }   
      }
      lastVal = val;
    
      blink();
    }