diff --git a/intro_html/img/head4.png b/intro_html/img/head4.png
new file mode 100644
index 0000000..3373f85
Binary files /dev/null and b/intro_html/img/head4.png differ
diff --git a/intro_html/js.html b/intro_html/js.html
index 3c98497..2db6225 100644
--- a/intro_html/js.html
+++ b/intro_html/js.html
@@ -76,28 +76,36 @@
         function showNumber1() {
             document.getElementById('numbersAndButtons').innerHTML = /*HTML*/ `
             <button onclick="showNumber4()">◀</button>
-            <div style="width: 40px; text-align: center;">1</div>
+            <div style="width: 200px; text-align: center;">
+                    <img src="img/head1.png">
+                </div>
             <button onclick="showNumber2()">▶</button>
         `;
         }
         function showNumber2() {
             document.getElementById('numbersAndButtons').innerHTML = /*HTML*/ `
             <button onclick="showNumber1()">◀</button>
-            <div style="width: 40px; text-align: center;">2</div>
+            <div style="width: 200px; text-align: center;">
+                <img src="img/head2.png">
+                </div>
             <button onclick="showNumber3()">▶</button>
         `;
         }
         function showNumber3() {
             document.getElementById('numbersAndButtons').innerHTML = /*HTML*/ `
             <button onclick="showNumber2()">◀</button>
-            <div style="width: 40px; text-align: center;">3</div>
+            <div style="width: 200px; text-align: center;">'
+                <img src="img/head3.png">
+                </div>
             <button onclick="showNumber4()">▶</button>
         `;
         }
         function showNumber4() {
             document.getElementById('numbersAndButtons').innerHTML = /*HTML*/ `
             <button onclick="showNumber3()">◀</button>
-            <div style="width: 40px; text-align: center;">4</div>
+            <div style="width: 200px; text-align: center;">
+                <img src="img/head4.png">
+                </div>
             <button onclick="showNumber1()">▶</button>
         `;
         }