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HTML

              
                <h1> The Great 
  <br>
  <span id ="colorDisplay"> RGB  
  </span> 
  <br>
  Color Game</h1>
<div id = "stripe">
  <button id ="reset">New Colors</button>
  <span id="message"></span>
  <button class="mode">Easy</button>
  <button class="mode selected">Hard</button>
    </div>
<div id = "container"> 
  <div class ="square"></div>
  <div class ="square"></div>
  <div class ="square"></div>
  <div class ="square"></div>
  <div class ="square"></div>
  <div class ="square"></div>
</div>
              
            
!

CSS

              
                @import url(https://fonts.googleapis.com/css?family=Ubuntu);

body {
  background-color: #232323;
  margin: 0;
  font-family: 'Ubuntu';
}

.square {
  width: 30%;
  background: purple; 
  padding-bottom: 30%;
  float: left;
  margin: 1.66%;
  border-radius: 15%;
  transition: background 0.6s;
  -webkit-transition: background 0.6s;
  -moz-transition: background 0.6s;
}

#container {
  margin: 20px auto;
  max-width: 600px;
}

h1 {
  color: white;
  line-height: 1.1;
  text-align: center;
  background: steelblue;
  margin: 0;
  font-weight: normal;
  text-transform: uppercase;
  padding: 20px 0;
}

#colorDisplay {
  font-size: 200%;
}

#stripe {
  background: white;
  height: 30px;
  text-align: center;
}

.selected {
  color: white;
  background: steelblue;
}

button {
  border: none;
  background: none;
  text-transform: uppercase;
  height: 100%;
  font-weight: 700;
  color: steelblue;
  letter-spacing: 1px;
  font-size: inherit; 
  transition: all 0.3s;
  -webkit-transition: all 0.3s;
  -moz-transition: all 0.3s;
  outline: none;
}

button:hover {
  color: white;
  background: steelblue;
}

#message {
  display: inline-block;
  width: 20%;
}
              
            
!

JS

              
                var numSquares = 6;
var colors = [];
var pickedColor;
var squares = document.querySelectorAll(".square");
var colorDisplay = document.getElementById("colorDisplay");
var messageDisplay = document.querySelector("#message");
var h1 = document.querySelector("h1");
var resetButton = document.querySelector("#reset");
var easyBtn = document.querySelector("#easyBtn");
var hardBtn = document.querySelector("#hardBtn");
var modeButtons = document.querySelectorAll(".mode");

init();

function init() {
  //mode buttons event listeners
 setupModeButtons();
 setupSquares();
 reset();
}

function setupModeButtons() {
   for(var i =0; i < modeButtons.length; i++){
    modeButtons[i].addEventListener("click", function(){
    modeButtons[0].classList.remove("selected");
    modeButtons[1].classList.remove("selected");
    this.classList.add("selected");
    this.textContent === "Easy" ? numSquares = 3: numSquares = 6;
    reset();
  }); 
 }
}

function setupSquares(){
  for(var i = 0; i <squares.length; i++) {
  squares[i].addEventListener("click", function(){
    var clickedColor = this.style.backgroundColor;
    if(clickedColor === pickedColor) {
      messageDisplay.textContent = "Correct!";
      resetButton.textContent = "Play Again?";
      changeColors(clickedColor);
      h1.style.backgroundColor = clickedColor;
    } else {
      this.style.backgroundColor = "#232323";
      messageDisplay.textContent = "Try Again";
     }
   });
 } 
}

function reset() {
  colors = generateRandomColors(numSquares);
  //pick a new random color from array
  pickedColor = pickColor();
  //change color display to match picked color
  colorDisplay.textContent = pickedColor;
  resetButton.textContent = "New Colors";
  messageDisplay.textContent = "";
  //change color of squares
  for (var i = 0; i < squares.length; i++) {
    if(colors[i]) {
      squares[i].style.display ="block";
      squares[i].style.backgroundColor = colors[i]; 
    } else { 
      squares[i].style.display = "none";    
    }  
  }
    h1.style.backgroundColor = "steelblue";
}

resetButton.addEventListener("click", function(){
 reset();
});

function changeColors(color) {
  //loop through all squares
  for(var i = 0; i < squares.length; i++) {
   //change each color to given color
    squares[i].style.backgroundColor= color;
  } 
};

function pickColor(){
  var random = Math.floor(Math.random() *      colors.length);
  return colors[random];
};

function generateRandomColors(num){
  //make an array
  var arr = []
  //repeat num times
  for(var i = 0; i < num; i++){
     //get random color and push into array
    arr.push(randomColor());
  }
  //return that array
  return arr;
}

function randomColor() {
  // pick a "red" from 0 to 255
  var r = Math.floor(Math.random() * 256);
  // pick a "green" from 0 to 255
  var g = Math.floor(Math.random() * 256);
  // pick a "blue" from 0 to 255
  var b = Math.floor(Math.random() * 256);
  return "rgb(" + r + ", " + g + ", " + b + ")";
};
  
              
            
!
999px

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