how to make a image grid responsive in website and how to add the light box image to the website

for this we need to add the html code and css code
1.image grid responsive:
html<div class=”row”>
  <div class=”column”>
    <img src=”wedding.jpg”>
    <img src=”rocks.jpg”>
    <img src=”falls2.jpg”>
    <img src=”paris.jpg”>
    <img src=”nature.jpg”>
    <img src=”mist.jpg”>
    <img src=”paris.jpg”>
  </div>
  <div class=”column”>
    <img src=”underwater.jpg”>
    <img src=”ocean.jpg”>
    <img src=”wedding.jpg”>
    <img src=”mountainskies.jpg”>
    <img src=”rocks.jpg”>
    <img src=”underwater.jpg”>
  </div>
  <div class=”column”>
    <img src=”wedding.jpg”>
    <img src=”rocks.jpg”>
    <img src=”falls2.jpg”>
    <img src=”paris.jpg”>
    <img src=”nature.jpg”>
    <img src=”mist.jpg”>
    <img src=”paris.jpg”>
  </div>
  <div class=”column”>
    <img src=”underwater.jpg”>
    <img src=”ocean.jpg”>
    <img src=”wedding.jpg”>
    <img src=”mountainskies.jpg”>
    <img src=”rocks.jpg”>
    <img src=”underwater.jpg”>
  </div>
</div>
css:

.row {
display: flex;
flex-wrap: wrap;
padding: 0 4px;
}
.column {
flex: 50%;
padding: 0 4px;
}

.column img {
margin-top: 8px;
vertical-align: middle;
}
2. light box image:

<!– The Modal/Lightbox –>
<div id=”myModal” class=”modal”>
<span class=”close cursor” onclick=”closeModal()”>×</span>
<div class=”modal-content”>

    <!– Thumbnail image controls –>
    <div class=”column”>
      <img class=”demo” src=”img1.jpg” onclick=”currentSlide(1)” alt=”Nature”>
    </div>

    <div class=”column”>
      <img class=”demo” src=”img4.jpg” onclick=”currentSlide(4)” alt=”Lights”>
    </div>
  </div>
</div>
css:

.row > .column {
padding: 0 8px;
}

.row:after {
content: “”;
display: table;
clear: both;
}

.column {
float: left;
width: 25%;
}

.modal {
display: none;
position: fixed;
z-index: 1;
padding-top: 100px;
left: 0;
top: 0;
width: 100%;
height: 100%;
overflow: auto;
background-color: black;
}

.modal-content {
position: relative;
background-color: #fefefe;
margin: auto;
padding: 0;
width: 90%;
max-width: 1200px;
}

.close {
color: white;
position: absolute;
top: 10px;
right: 25px;
font-size: 35px;
font-weight: bold;
}

.close:hover,
.close:focus {
color: #999;
text-decoration: none;
cursor: pointer;
}

.mySlides {
display: none;
}

.prev,
.next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -50px;
color: white;
font-weight: bold;
font-size: 20px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
user-select: none;
-webkit-user-select: none;
}

.next {
right: 0;
border-radius: 3px 0 0 3px;
}

.prev:hover,
.next:hover {
background-color: rgba(0, 0, 0, 0.8);
}

.numbertext {
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
position: absolute;
top: 0;
}

.caption-container {
text-align: center;
background-color: black;
padding: 2px 16px;
color: white;
}

img.demo {
opacity: 0.6;
}

.active,
.demo:hover {
opacity: 1;
}

img.hover-shadow {
transition: 0.3s;
}

.hover-shadow:hover {
box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

script:
<script>

function openModal() {
document.getElementById(“myModal”).style.display = “block”;
}

function closeModal() {
document.getElementById(“myModal”).style.display = “none”;
}

var slideIndex = 1;
showSlides(slideIndex);

function plusSlides(n) {
showSlides(slideIndex += n);
}

function currentSlide(n) {
showSlides(slideIndex = n);
}

function showSlides(n) {
  var i;
  var slides = document.getElementsByClassName(“mySlides”);
  var dots = document.getElementsByClassName(“demo”);
  var captionText = document.getElementById(“caption”);
  if (n > slides.length) {slideIndex = 1}
  if (n < 1) {slideIndex = slides.length}
  for (i = 0; i < slides.length; i++) {
    slides[i].style.display = “none”;
}
  for (i = 0; i < dots.length; i++) {
    dots[i].className = dots[i].className.replace(” active”, “”);
}
slides[slideIndex-1].style.display = “block”;
dots[slideIndex-1].className += ” active”;
captionText.innerHTML = dots[slideIndex-1].alt;
}
</script>

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