/* Morse Code via USB Interface 
    30 Arduino Projects for the Evil Genius; Page 31-35 
    with PushButton restart added */

int   ledPin = 13; // Output to pin 13
int    pbPin = 9;  // connect push button to this pin

void setup ( ) { 
  pinMode (ledPin, OUTPUT);   
  pinMode (pbPin, INPUT);       // Set pbPin as a digital Input
  digitalWrite(pbPin, OUTPUT);  //enable 20K pull-up resistor
}

void loop( ) {    
    digitalWrite(ledPin, HIGH);	// Turn ON LED

// S (...)
	delay(200); digitalWrite(ledPin, LOW);  // first dot
	delay(200); digitalWrite(ledPin, HIGH);

	delay(200); digitalWrite(ledPin, LOW); // second dot
	delay(200); digitalWrite(ledPin, HIGH);

	delay(200); digitalWrite(ledPin, LOW); // third dot
	delay(500); digitalWrite(ledPin, HIGH);

// O (---) 
	delay(500); digitalWrite(ledPin, LOW); // first dash
	delay(500); digitalWrite(ledPin, HIGH);
	delay(500); digitalWrite(ledPin, LOW); // second dash
	delay(500); digitalWrite(ledPin, HIGH);
	delay(500); digitalWrite(ledPin, LOW); // third dash
	delay(500); digitalWrite(ledPin, HIGH);

// S (...) 
	delay(200); digitalWrite(ledPin, LOW); // first dot
	delay(200); digitalWrite(ledPin, HIGH);
	delay(200); digitalWrite(ledPin, LOW); // second dot
	delay(200); digitalWrite(ledPin, HIGH);
	delay(200); digitalWrite(ledPin, LOW); // third dot

while(true) { 
  if(digitalRead(pbPin)==LOW) 
  	// Reads pbPin, if OFF (LOW) keeps watching it
  	// If ON (pushed or ON) go to 1 second delay below. 
  	// If held in (ON), repeat until switch = LOW or (FF)
 break; // go to 1 second delay and resend message
  else 
     continue; 
}
	delay(1000);	// wait 1 second before we start again
}