// DIGITAL
int LED_pin = 0;
int BUTTON_pin = A3;

// LED variables
int LED_cycle = 1000/10; // length of LED cycle
float LED_duty = LED_cycle;//0.9; // Brightness of LED
float LED_off = LED_cycle;//1-LED_duty; // 
int LED_delay = LED_cycle*2; // delay between cycles
int LED_morseDelay = LED_delay*4; // delay between morse code



void setup() {
  // put your setup code here, to run once:
pinMode(LED_pin, OUTPUT);// PULLUP?
pinMode(BUTTON_pin, INPUT_PULLUP);
  // Initialize serial communications at 9600 bps
  // Only used for debug
  Serial.swap(1);
  Serial.begin(9600);
  while(!Serial);
}

void loop() {
  // put your main code here, to run repeatedly:
if(digitalRead(BUTTON_pin) == LOW){
Hello();

}else{
  digitalWrite(LED_pin, LOW);
}

}
void LED_dot(){
 digitalWrite(LED_pin,HIGH);
 delay(LED_duty);
 digitalWrite(LED_pin,LOW);
 //delay(LED_off); 
 //serial
  Serial.print(" . ");
}

void LED_dash(){
  digitalWrite(LED_pin,HIGH);
 delay(LED_duty*4);
 digitalWrite(LED_pin,LOW);
 //serial
  Serial.print(" - ");
}

void Hello(){
////////////// h ....
Serial.print("H ");
LED_dot();
delay(LED_delay);
LED_dot();
delay(LED_delay);
LED_dot();
delay(LED_delay);
LED_dot();
delay(LED_morseDelay);
//serial
  Serial.print("   ");
////////////// e .
Serial.print("e ");
LED_dot();
delay(LED_morseDelay);
Serial.print("   ");
////////////// l .-..
Serial.print("l ");
LED_dot();
delay(LED_delay);
LED_dash();
delay(LED_delay);
LED_dot();
delay(LED_delay);
LED_dot();
delay(LED_morseDelay);
Serial.print("   ");
////////////// l .-..
Serial.print("l ");
 LED_dot();
delay(LED_delay);
LED_dash();
delay(LED_delay);
LED_dot();
delay(LED_delay);
LED_dot();
delay(LED_morseDelay);
Serial.print("   ");
////////////// o ---
Serial.print("o ");
LED_dash();
delay(LED_delay);
LED_dash();
delay(LED_delay);
LED_dash();
delay(LED_morseDelay);
Serial.print("   ");
Serial.println("");
}