volatile int count = 0;   //variable counts 2sec delays to make 10
volatile int state = 0;  //keeps track of what state the program is in

void setup()
{
    cli();  //disable interrupts
    DDRB |= 0x01;  //pin D8 is output for LED
    TCCR1A = 0x00; //normal timer1 operation
    TCCR1B = 0x00; // "
    TCCR1B |= (1 << CS10); //prescalar set to 1024
    TCCR1B |= (1 << CS12); // "
    sei();   //enable global interrupts
}

void loop()
{
  if(!(PINB & 0x02)) //if pin D9 goes low
  {
    if(state == 0) //light on 10 secs
    {
        PORTB |= 0x01; //LED ON
        TCNT1 = 0;  //initialize timer to 0
        count = 0;  //initialize counter to 0
        TIMSK1 |= (1 << OCIE1A);  //enable 10 sec interrupt
    }

    if(state == 1) //light flashes for 10 secs
    {
        PORTB &= ~0x01; //led off, then toggles in ISR
        TCNT1 = 0;  //initialize timer to 0
        count = 0;  //initialize counter to 0
        TIMSK1 |= (1 << OCIE1A);  // start 10 sec
        TIMSK1 |= (1 << OCIE1B);  // start toggle 200ms
    }

    state += 1;  //increase button count
    delay(100);  //debounce
    while(!(PINB & 0x02));  //stay here while button is pressed
    delay(100);  //debounce
  }
}

ISR(TIMER1_COMPA_vect) //10 second
{
  count += 1;
  OCR1A = TCNT1 + 31250; //up the Output compare another 2 secs from now
  if(count >= 5) //do 2 second delays 5 times
  {
    TIMSK1 = (0 << OCIE1A); //disable compares
    TIMSK1 = (0 << OCIE1B); // "

    count = 0;
    state = 0;
    PORTB &= ~0x01; // LED off
  }
}

ISR(TIMER1_COMPB_vect) //200 ms
{
    OCR1B = TCNT1 + 3125; //up the OC 200 ms from now
    if(PINB & 0x01)  //toggle LED
    {
      PORTB &= ~0x01;
    }else
     {
      PORTB |= 0x01;
     }
}