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HTML

              
                <html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Simon-Free Code Camp</title>
    <link rel="stylesheet" type="text/css" href="css/app.css">
    <link href="https://fonts.googleapis.com/css?family=Teko:700" rel="stylesheet">
  </head>
  <body>
    <div id="wrap">
      <div id="game">
        <div id="buttons">
          <button id="btn_green" class="btn_gameplay" value="1" disabled></button>
          <button id="btn_red" class="btn_gameplay" value="2" disabled></button>
          <button id="btn_yellow" class="btn_gameplay" value="3" disabled></button>
          <button id="btn_blue" class="btn_gameplay" value="4" disabled></button>
        </div>
        <div id="center">
          <div id="name"><h1>Simon</h1></div>
          <div id="main_controls">
            <div id="count">
              <h2>--</h2>
              <h3 id="count">count</h3>
            </div>
            <div id="start">
              <button id="btn_start" disabled></button>
              <h3>start</h3>
            </div>
            <div id="strict">
              <button id="btn_strict" disabled></button>
              <div class="strict_indicator"></div>
              <h3>strict</h3>
            </div>
          </div>
          <div id="power">
            <h3>off
              <span id="off-on">
                <label class="switch">
                  <input type="checkbox">
                  <span class="slider"></span>
                </label>
              </span>
              on</h3>
          </div>
        </div>
        <div id="background"></div>
      </div>
    </div>
    <script src="https://code.jquery.com/jquery-3.3.1.js"></script>
    <script src="js/app.js"></script>
  </body>
</html>

              
            
!

CSS

              
                /* Global */
* {
  padding: 0;
  margin: 0;
  border: none;
  text-align: center;
}
html {
  box-sizing: border-box;
  overflow: hidden; /* Eliminates scroll bar */
}
#wrap {
  display: flex;
  height: 100vh; /* Need height or won't vertically center */
  justify-content: center;
  align-items: center;

  /* Photo by artbaggage from Pixabay.com */
  background: center  no-repeat url('https://raw.githubusercontent.com/Feldbot/fCCassets/master/project-10-build-a-simon-game/circular-837510_1920.jpg');
}

#game {
  position: relative;
  width: 310px;
  height: 310px;
}
#buttons {
  position: absolute;
  top: 50%;
  left: 50%;
  margin: -139px 0 0 -139px;
  display: grid;
  grid-template-columns: repeat(2, 135px);
  grid-template-rows: repeat(2, 135px);
  grid-gap: .5em; /* 8px */
  grid-template-areas:
  'green   red'
  'yellow  blue';
}
.btn_gameplay {
  width: 135px;
  height: 135px;
  opacity: .5;
}
#btn_green {
  grid-area: green;
  background-color: rgb(62,222,75);
  border-radius: 100% 0 0 0;
}
#btn_red {
  grid-area: red;
  background-color: rgb(222,75,62);
  border-radius: 0 100% 0 0;
}
#btn_blue {
  grid-area: blue;
  background-color: rgb(75,62,222);
  border-radius: 0 0 100% 0;
}
#btn_yellow {
  grid-area: yellow;
  background-color: rgb(255,234,55);
  border-radius: 0 0 0 100%;
}

/* Center UI controls */
#center {
  z-index: 10;
  position: absolute;
  top: 50%;
  left: 50%;
  margin: -80px 0 0 -80px;
  width: 160px;
  height: 160px;
  background-color: rgb(255,255,255);
  border: 1px solid rgb(0,0,0);
  border-radius: 50%;
}
#name {
  margin-top: -5px;
}
#main_controls {
  display: flex;
  justify-content: space-around;
  height: 50px;
  margin: 0px 5px;
  position: relative;
}
div#count{
  background-color: rgb(25,25,25);
  border-radius: 6px;
  width: 30px;
  height: 25px;
  position: relative;
  top: -2px;
}
#btn_start, #btn_strict {
  width: 20px;
  height: 20px;
  border: 1px solid grey;
  border-radius: 50%;
}
#btn_start {
  background-color: rgb(255,0,0);
}
#btn_strict {
  background-color: rgb(255,255,0);
}
#strict {
  position: relative;
}
.strict_indicator {
  width: 10px;
  height: 10px;
  background-color: rgb(25,25,25);
  border-radius: 50%;
  position: absolute;
  top: -10px;
  right: 0;
}
.red_indicator {
  background-color: rgb(255,0,0);
}

/* Toggle switch code: https://www.w3schools.com/howto/howto_css_switch.asp */
/* The switch box around On/Off slider */
.switch {
  position: relative;
  display: inline-block;
  width: 35px;
  height: 21px;
}
/* Hide default HTML checkbox */
.switch input {display: none;}
/* The slider */
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .2s;
  transition: .2s;
}
.slider:before {
  position: absolute;
  content: "";
  height: 15px;
  width: 15px;
  left: 4px;
  bottom: 3px;
  background-color: white;
  -webkit-transition: .2s;
  transition: .2s;
}
input:checked + .slider { /* + is adjacent sibling combinator */
  background-color: #2196F3;
}
input:focus + .slider {
  box-shadow: 0 0 1px #2196F3;
}
input:checked + .slider:before {
  -webkit-transform: translateX(13px);
  -ms-transform: translateX(13px);
  transform: translateX(13px);
}

#background {
  background-color: rgb(22,22,22);
  z-index: -10;
  width: 310px;
  height: 310px;
  border-radius: 50%;
  box-shadow: 10px 10px 22px rgb(72,72,72);
}

/* Typography */
h1, h2, h3 {
  font-family: sans-serif;
  text-align: center;
}
h1 {
  font-family: "Teko";
  font-weight: 700;
  font-size: 2.5em;
  margin-top: 15px;
}
h2 {
  font-size: 1.2em;
  color: rgb(90,25,25);
}
h3 {
  font-size: .8em;
  margin-top: 5px;
}
h3#count {
  padding-top: 4px;
}

/*  Responsive (tablet and above ) */
@media screen and (min-width: 600px) {
  #game {
    position: relative;
    width: 510px;
    height: 510px;
  }
  #buttons {
    margin: -228px 0 0 -228px;
    grid-template-columns: repeat(2, 220px);
    grid-template-rows: repeat(2, 220px);
    grid-gap: 1em;
  }
  .btn_gameplay {
    width: 220px;
    height: 220px;
  }
  #center {
    margin: -130px 0 0 -130px;
    width: 260px;
    height: 260px;
  }
  #main_controls {
    justify-content: space-around;
    height: 75px;
    margin: 10px;
  }
  div#count{
    border-radius: 6px;
    width: 45px;
    height: 40px;
    top: -10px;
  }
  #btn_start, #btn_strict {
    width: 25px;
    height: 25px;
  }
  .strict_indicator {
    width: 12px;
    height: 12px;
    top: -15px;
    right: 0;
  }
  .switch {
    margin: -5px 3px;
    width: 45px;
    height: 26px;
  }
  .slider:before {
    height: 18px;
    width: 18px;
    left: 6px;
    bottom: 4px;
    background-color: white;
    -webkit-transition: .2s;
    transition: .2s;
  }
  input:checked + .slider:before {
    -webkit-transform: translateX(15px);
    -ms-transform: translateX(15px);
    transform: translateX(15px);
  }
  #background {
    width: 510px;
    height: 510px;
    box-shadow: 20px 20px 42px rgb(72,72,72);
  }
  h1 {
    font-size: 4em;
    margin-top: 30px;
  }
  h2 {
    font-size: 2em;
    margin-top: 2px;
  }
  h3 {
    font-size: 1em;
    margin-top: 13px;
  }
  h3#count {
    padding-top: 0;
    margin-top: 12px;
  }
}

              
            
!

JS

              
                var simon = {
  init: function() {
    this.count = 1; // player move count
    this.round = 1; // game round
    this.sequence = [];
    this.player_move = null;
    this.player_turn = false;
  },
  count: 1,
  round: 1,
  strict: false,
  power_on: false,
  player_turn: false,
  sequence: [],
  nextSequence: function() {
    return this.sequence.slice(0, this.round + 1);
  },
  currentSequence: function() {
    return this.sequence.slice(0, this.round);
  },
  player_sequence: [],
  current_move: null,
  player_move: null,
  keypress: 0,
  error: false,
  mapFeedback: function(num) {
    var sound, light;

    switch (num) {
      case 1: // Green
        sound = new Audio ('https://raw.githubusercontent.com/Feldbot/fCCassets/master/project-10-build-a-simon-game/1_green.mp3'),
        light = $("#btn_green").css("opacity", "1");
        if (simon.player_turn) { simon.player_move = 1; }
        if (!simon.player_turn) { simon.current_move = 1; }
        break;
      case 2: // Red
        sound = new Audio ('https://raw.githubusercontent.com/Feldbot/fCCassets/master/project-10-build-a-simon-game/2_red.mp3'),
        light = $("#btn_red").css("opacity", "1");
        if (simon.player_turn) { simon.player_move = 2; }
        if (!simon.player_turn) { simon.current_move = 2; }
        break;
      case 3: // Yellow
        sound = new Audio ('https://raw.githubusercontent.com/Feldbot/fCCassets/master/project-10-build-a-simon-game/3_yellow.mp3'),
        light = $("#btn_yellow").css("opacity", "1");
        if (simon.player_turn) { simon.player_move = 3; }
        if (!simon.player_turn) { simon.current_move = 3; }
        break;
      case 4: // Blue
        sound = new Audio ('https://raw.githubusercontent.com/Feldbot/fCCassets/master/project-10-build-a-simon-game/4_blue.mp3'),
        light = $("#btn_blue").css("opacity", "1");
        if (simon.player_turn) { simon.player_move = 4; }
        if (!simon.player_turn) { simon.current_move = 4; }
        break;
    }

    renderFeedback(sound, light);
  }
}

// Timers
var playAlertID,
    playCurrentSequenceID;

simon.init(); // Start game

// Power off/on button
$("label.switch input").on("click", function() {
  if (simon.power_on === false) {
    simon.power_on = true;
    $("h2").css("color", "rgb(242,72,72)");

    // Turn on Start/Strict buttons
    $("#btn_start, #btn_strict")
    .prop("disabled", false).css("cursor", "pointer");
    console.log('power on');

  } else {
    simon.power_on = false;
    $("h2").css("color", "rgb(90,25,25)");

    // Turn off buttons and behavior
    $("#btn_start, #btn_strict, .btn_gameplay")
    .prop("disabled", true).css("cursor", "default");
    $("h2").text("--");
    $(".strict_indicator").removeClass("red_indicator");

    clearTimeout(playAlertID);
    clearTimeout(playCurrentSequenceID);

    console.log('power off');
  }
})

// Start/strict event handlers
$("#btn_start").on("click", function() { startGame(); });
$("#btn_strict").on("click", function() {
  simon.strict = !simon.strict;
  $(".strict_indicator").toggleClass("red_indicator");
});

// Capture player move, update board, and check input
$(".btn_gameplay").on("click", function() {
  simon.player_move = parseInt(this.value);

  // TODO Limit keypresses to number of rounds
  // simon.keypress++;
  // if (simon.keypress > simon.round) {
  //   $(".btn_gameplay").prop("disabled", true).css("cursor", "default");
  //   $(".btn_gameplay").off("click");
  //   console.log('lay off da keys!');
  // }

  // playTimer();
  checkMove();
});

// Colored buttons UI availability
function toggleButtons() {
  if (simon.player_turn) {
    $(".btn_gameplay").prop("disabled", false).css("cursor", "pointer");
  } else {
    $(".btn_gameplay").prop("disabled", true).css("cursor", "default");
    $(".btn_gameplay").off("click");
  }
}

function startGame() {
  simon.init();
  alert("--");
  createSequence();
  setTimeout(playSequence, 1000, [simon.sequence[0]]);
}

function createSequence() {
  simon.sequence = [];
  for (var i = 0; i < 20; i++) {
    simon.sequence.push(Math.ceil(Math.random() * (4)));
  }
}

// Iterates over sequence array and plays individual element
function playSequence(sequence) {

  simon.player_turn = false;
  $("h2").text(simon.round);
  for (let i = 0; i < sequence.length; i++) {
    setTimeout(function() {
      simon.mapFeedback(sequence[i]);

      // When length is met queue player turn and start timer
      if (i === sequence.length - 1) {
        setTimeout(function() {
          takeTurn();
        }, 1500);
      }
    }, i * 1000); // increase time with each round
  }
}

function renderFeedback(sound, light) {

  // If no error play sound (otherwise error buzz plays)
  if (!simon.error) {
    sound.play();
  }
  light;
  setTimeout(function() {
    light.css("opacity", ".5");
  }, 250, light);
}

function takeTurn() {
  simon.player_turn = true;

  toggleButtons();
  // playTimer();  // Starts timer input or not
}

// Alerts and resets game if player times out
// TODO: Get this function working! 
// function playTimer() {

//   playAlertID = setTimeout(function() {
//     alert('!!', 'buzz');
//     console.log('timeout!')

//     // Replays current sequence
//     playCurrentSequenceID = setTimeout(playSequence, 1000, simon.currentSequence());

//     // If input entered clear timer
//     if (simon.player_move !== null) {
//       console.log('player moved')

//       clearTimeout(playAlertID);
//       clearTimeout(playCurrentSequenceID);
//     }
//   }, 3000);
// }

function alert(text, sound) {
  var win, buzz;

  // Blink text and display current round
  $("h2").text(text).fadeOut(250).fadeIn(250).fadeOut(250).fadeIn(250);

  if (sound === 'win') {
    // Courtesy https://freesound.org/s/342218/
    win = new Audio ('https://raw.githubusercontent.com/Feldbot/fCCassets/master/project-10-build-a-simon-game/win.mp3'),
    setTimeout(function() {
      win.play();
    }, 500);
    setTimeout(startGame, 3500);
  } else if (sound === 'buzz') {
    // Courtesy RICHERlandTV, freesound.org
    // https://freesound.org/s/216090/
    // https://creativecommons.org/licenses/by/3.0/
    // Changed filename from:
    // 216090__richerlandtv__bad-beep-incorrect
    buzz = new Audio ('https://raw.githubusercontent.com/Feldbot/fCCassets/master/project-10-build-a-simon-game/buzz.mp3'),
    buzz.play();
  }
}

function checkMove() {

  // Check if player move matches the current sequence
  if (simon.player_move === simon.currentSequence()[simon.count - 1]) {

    clearTimeout(playAlertID);
    clearTimeout(playCurrentSequenceID);

    // Generate player sequence array from player moves
    simon.player_sequence[simon.count - 1] = simon.player_move;

    simon.mapFeedback(simon.player_move);

    // Advance sequence when last match is made
    if (simon.count === simon.currentSequence().length) {
      simon.count = 1; // Check at beginning on next round

      // Game not won - play next sequence
      if (simon.round !== 9) {
        setTimeout(playSequence, 1000, simon.nextSequence());
        simon.player_move = null;

      // Game won - alert victory and restart
    } else if (simon.round === 9)  {
        alert('**', 'win');
        simon.init();
      }

      simon.round++;

    // Keep checking sequence until last match
    } else {
      simon.count++;
      // playTimer();
    }

  // If player move doesn't match current sequence
  } else {
    simon.error = true;
    simon.mapFeedback(simon.player_move);
    simon.error = false;
    alert('!!', 'buzz');
    simon.player_move = null;
    simon.count = 1;
    playCurrentSequenceID = setTimeout(playSequence, 1000, simon.currentSequence());

    // Start over again in non-strict mode
    if (simon.strict) {
      clearTimeout(playCurrentSequenceID);
      setTimeout(startGame, 1300);
    }
  }
}


/***** Notes *****

// Clear all timeouts strategy (create simon.timeouts array)

simon.timeouts.push(playAlertID, playCurrentSequenceID);

function clearAllTimeouts() {
  console.log('simon.timeouts ', simon.timeouts);
  for (var i = 0; i < simon.timeouts.length; i++) {
    clearTimeout(simon.timeouts[i]);
  }
  simon.timeouts = [];
}
*/


              
            
!
999px

Console