void setup() {
  // put your setup code here, to run once:
  pinMode(8, OUTPUT);                     // set pin 8 as an output (only)
  tone(8,440);                            // 440Hz tone
  noTone(8);                              // off sound
}

void loop() {
  // output a morse code for my first name 'STEFAN' (STEFAN ~ (dot-dot-dot)-(space letters)-(dash)-(space letters)-(dot)-(space letters)-(dot-dot-dash-dot)-(space letters)-(dot-dash)-(space letters)-(dash-dot)-(space words)
  // dot
  tone(8,440);                            // 440Hz tone
  delay(240);                             // dot(=1 unit)
  noTone(8);                              // silence/pause 
  delay(240);                             // between pulse of same character pause (one unit)
  // dot
  tone(8,440);                            // 440Hz tone
  delay(240);                             // dot(=1 unit)
  noTone(8);                              // silence/pause 
  delay(240);                             // between pulse of same character pause (one unit)
  // dot
  tone(8,440);                            // 440Hz tone
  delay(240);                             // dot(=1 unit)
  // space between letters                // pause between letters (3 units)
  noTone(8);                              // silence/pause 
  delay(3*240);                          
  // dash
  tone(8,440);                            // 440Hz tone
  delay(3*240);                           // dash(=3 unites)
  // space between letters                // pause between letters (3 units)
  noTone(8);                              // silence/pause 
  delay(3*240);                                  
  // dot
  tone(8,440);                            // 440Hz tone
  delay(240);                             // dot(=1 unit)
  // space between letters                // pause between letters (3 units)
  noTone(8);                              // silence/pause 
  delay(3*240);                          
  // dot
  tone(8,440);                            // 440Hz tone
  delay(240);                             // dot(=1 unit)
  noTone(8);                              // silence/pause 
  delay(240);                             // between pulse of same character pause (one unit)
  // dot
  tone(8,440);                            // 440Hz tone
  delay(240);                             // dot(=1 unit)
  noTone(8);                              // silence/pause 
  delay(240);                             // between pulse of same character pause (one unit)
  // dash
  tone(8,440);                            // 440Hz tone
  delay(3*240);                           // dash(=3 unites)                       
  // dot
  tone(8,440);                            // 440Hz tone
  delay(240);                             // dot(=1 unit)
  // space between letters                // pause between letters (3 units)
  noTone(8);                              // silence/pause
  delay(3*240);
  // dot
  tone(8,440);                            // 440Hz tone
  delay(240);                             // dot(=1 unit)
  noTone(8);                              // silence/pause 
  delay(240);                             // between pulse of same character pause (one unit)
  // dash
  tone(8,440);                            // 440Hz tone
  delay(3*240);                           // dash(=3 units)
  // space between letters                // pause between letters (3 units)
  noTone(8);                              // silence/pause
  delay(3*240);
  // dash
  tone(8,440);                            // 440Hz tone
  delay(3*240);                           // dash(=3 unites)
  noTone(8);                              // silence/pause
  delay(240);                             // between pulse of same character pause (one unit)
  // dot
  tone(8,440);                            // 440Hz tone
  delay(240);                             // dot(=1 unit)
  // space between words
  noTone(8);                              // silence/pause
  delay(7*240);                           // pause between letters (seven units)
}