#include <Arduino.h>
#include <util/delay.h>
#include <avr/io.h>

int main(void)
{
  DDRB = B1; //set pin 8 as output
  DDRC = B0; //set pin A0 as input

  PINC = B00; //clear memory, set pin A0 = low
  PORTB = B000000; //clear memory, turn off all pins 8 to 13
while(1)
{
  if(PINC == B1)
  {
    //begin the START prosign dah dih dah dih dah
    //dah
    PORTB = B1; //turn on LED
    _delay_ms(1000); //delay 1s
    PORTB = B0;
    _delay_ms(333); //delay 0.333s - dark region
    //dih
    PORTB = B1; //turn on LED
    _delay_ms(333); //delay 0.333s
    PORTB = B0; //turn off LED
    _delay_ms(333); //delay 0.333s - dark region
    //dah
    PORTB = B1; //turn on LED
    _delay_ms(1000); //delay 1s
    PORTB = B0;
    _delay_ms(333); //delay 0.333s - dark region
    //dih
    PORTB = B1; //turn on LED
    _delay_ms(333); //delay 0.333s
    PORTB = B0; //turn off LED
    _delay_ms(333); //delay 0.333s
    //dah
    PORTB = B1; //turn on LED
    _delay_ms(1000); //delay 1s
    PORTB = B0;
    _delay_ms(1000); //delay 1s - short gap - transfer from START to S

    //start SOS signal

    //start letter S
    //dih
    PORTB = B1; //turn on LED
    _delay_ms(333); //delay 0.333s
    PORTB = B0; //turn off LED
    _delay_ms(333); //delay 0.333s - dark region
    //dih
    PORTB = B1; //turn on LED
    _delay_ms(333); //delay 0.333s
    PORTB = B0; //turn off LED
    _delay_ms(333); //delay 0.333s - dark region
    //dih
    PORTB = B1; //turn on LED
    _delay_ms(333); //delay 0.333s
    PORTB = B0; //turn off LED
    _delay_ms(1000); //delay 1s - dark region - change to letter O

    //start letter O
    //dah
    PORTB = B1; //turn on LED
    _delay_ms(1000); //delay 1s
    PORTB = B0;
    _delay_ms(333); //delay 0.333s - dark region
    //dah
    PORTB = B1; //turn on LED
    _delay_ms(1000); //delay 1s
    PORTB = B0;
    _delay_ms(333); //delay 0.333s - dark region
    //dah
    PORTB = B1; //turn on LED
    _delay_ms(1000); //delay 1s
    PORTB = B0;
    _delay_ms(1000); //delay 0.333s - dark region - change to letter S

    //start letter S
    //dih
    PORTB = B1; //turn on LED
    _delay_ms(333); //delay 0.333s
    PORTB = B0; //turn off LED
    _delay_ms(333); //delay 0.333s - dark region
    //dih
    PORTB = B1; //turn on LED
    _delay_ms(333); //delay 0.333s
    PORTB = B0; //turn off LED
    _delay_ms(333); //delay 0.333s - dark region
    //dih
    PORTB = B1; //turn on LED
    _delay_ms(333); //delay 0.333s
    PORTB = B0; //turn off LED
    _delay_ms(1000); //delay 1s - dark region - transistion to STOP prosign

    //begin the STOP prosign dih dah dih dah dih
    //dih
    PORTB = B1; //turn on LED
    _delay_ms(333); //delay 0.333s
    PORTB = B0; //turn off LED
    _delay_ms(333); //delay 0.333s - dark region
    //dah
    PORTB = B1; //turn on LED
    _delay_ms(1000); //delay 1s
    PORTB = B0;
    _delay_ms(333); //delay 0.333s - dark region
    //dih
    PORTB = B1; //turn on LED
    _delay_ms(333); //delay 0.333s
    PORTB = B0; //turn off LED
    _delay_ms(333); //delay 0.333s - dark region
    //dah
    PORTB = B1; //turn on LED
    _delay_ms(1000); //delay 1s
    PORTB = B0;
    _delay_ms(333); //delay 0.333s - dark region
    //dih
    PORTB = B1; //turn on LED
    _delay_ms(333); //delay 0.333s
    PORTB = B0; //turn off LED
    _delay_ms(1000);
    //end of program
    PINC = B00;
  }

}
}