// Here are the ratios code elements:
   // Dash length = Dot length x 3
  //  Pause between elements = Dot length
    //  (pause between dots and dashes within the character)
 //   Pause between characters = Dot length x 3
 //   Pause between words = Dot length x 7
//   Here dot length is set at 100

int ledPin=8;
int buttonPin;
boolean startButtonState = HIGH;

 void setup() {
  // put your setup code here, to run once:
pinMode(ledPin,OUTPUT);
buttonPin = 3; // button pin assigned
pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
  
  //check button pressed, if so enter program condition (inside if statement)
  startButtonState = digitalRead(buttonPin);
  if (startButtonState == LOW){
  
    pulse(100); pulse(100); pulse(100);pulse(100); // H {dot(); dot(); dot(); dot();}
    delay(300); // in between letters gap
    pulse(100); // e {dot();}
    delay(300); // in between letters gap
    pulse(100); pulse(300); pulse(100);pulse(100); // l {dot(); dash(); dot(); dot();}
    delay(300); // in between letters gap
    pulse(100); pulse(300); pulse(100);pulse(100); // l {dot(); dash(); dot(); dot();}
    delay(300); // in between letters gap
    pulse(300); pulse(300); pulse(300); // 0 {dash(); dash(); dash();}
    delay(700); //  in between words gap
    pulse(100); pulse(300); pulse(300);pulse(100); // w {dot(); dash(); dash();}
    delay(300); // in between letters gap
    pulse(300); pulse(300); pulse(300); // 0 {dash(); dash(); dash();}
    delay(300); // in between letters gap
    pulse(100); pulse(300); pulse(100); // r  {dot(); dash(); dot();}
    delay(300); // in between letters gap
    pulse(100); pulse(300); pulse(100);pulse(100); // l {dot(); dash(); dot(); dot();}
    delay(300); // in between letters gap
    pulse(300); pulse(100);pulse(100); // d {dash(); dot(); dot();}
        delay(1000);  
  }
}
  
void pulse(int duration)
{
  digitalWrite(ledPin,HIGH);
  delay(duration);
  digitalWrite(ledPin,LOW);
  delay(duration);
}