simonNote.txt

 am presented with a random series of button presses.

User Story: Each time I input a series of button presses correctly, I see the same series of button presses but with an additional step.

User Story: I hear a sound that corresponds to each button both when the series of button presses plays, and when I personally press a button.

User Story: If I press the wrong button, I am notified that I have done so, and that series of button presses starts again to remind me of the pattern so I can try again.

User Story: I can see how many steps are in the current series of button presses.

User Story: If I want to restart, I can hit a button to do so, and the game will return to a single step.

User Story: I can play in strict mode where if I get a button press wrong, it notifies me that I have done so, and the game restarts at a new random series of button presses.

User Story: I can win the game by getting a series of 20 steps correct. I am notified of my victory, then the game starts over.

Hint: Here are mp3s you can use for each button: 
https://s3.amazonaws.com/freecodecamp/simonSound1.mp3
https://s3.amazonaws.com/freecodecamp/simonSound2.mp3
https://s3.amazonaws.com/freecodecamp/simonSound3.mp3
https://s3.amazonaws.com/freecodecamp/simonSound4.mp3

E-note (blue, lower right);
C♯-note (yellow, lower left);
A-note (red, upper right).
E-note (green, upper left, an octave lower than blue);

tempo: speeds up on 5th, 9th, and 13th step

win: 20th step correct, win! restart