diff --git a/README.md b/README.md
index 487c6b3..8ce079f 100644
--- a/README.md
+++ b/README.md
@@ -1,20 +1,14 @@
-<a href="https://martinkondor.github.io/SortingAlgorithms/"><p align="center"><img src="public/img/SortingAlgorithms.gif" width="550" title="Click to try it out!"></p></a>
+<a href="https://martinkondor.github.io/SortingAlgorithms/"><p align="center"><img src="public/img/SortingAlgorithms.gif" width="575" title="Click to try it out!"></p></a>
 
 # 📊 SortingAlgorithms
 
-[![Project Status](https://img.shields.io/badge/status-active-brightgreen.svg)](https://github.com/MartinKondor/SortingAlgorithms/)
-[![version](https://img.shields.io/badge/version-21.05-brightgreen.svg)](https://github.com/MartinKondor/SortingAlgorithms/)
-[![GitHub Issues](https://img.shields.io/github/issues/MartinKondor/SortingAlgorithms.svg)](https://github.com/MartinKondor/SortingAlgorithms/issues)
-![Contributions welcome](https://img.shields.io/badge/contributions-welcome-blue.svg)
-[![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://opensource.org/licenses/MIT)
-
 Sorting algorithms visualized.
 
 ## Implemented algorithms
   * Bubble sort
+  * Insertion sort
   
 ### TODO
-  * Insertion sort
   * Selection sort
   * Merge sort
   * Quicksort
diff --git a/index.html b/index.html
index 318831d..f4a0a1d 100644
--- a/index.html
+++ b/index.html
@@ -42,7 +42,7 @@
             <i class="fas fa-step-forward mr-1"></i>
             Forward
         </button>
-        <button id="randomize" class="btn btn-outline-warning">
+        <button id="randomize" class="btn btn-outline-secondary">
             <i class="fas fa-redo mr-1"></i>
             Randomize
         </button>
@@ -60,8 +60,8 @@
             <select id="algorithm" name="algorithm" class="">
                 <option value="bubble">Bubble Sort</option>
                 <option value="insertion">Insertion Sort</option>
+                <option value="merge">Merge Sort</option>
                 <!--
-                    <option value="merge">Merge Sort</option>
                     <option value="quick">Quick Sort</option>
                 -->
             </select>
diff --git a/public/js/index.js b/public/js/index.js
index 57c0bdc..d24dfb6 100644
--- a/public/js/index.js
+++ b/public/js/index.js
@@ -292,7 +292,39 @@
     }
 
     function insertionSort(arr) {
-        console.log("insertionSort");
+        for (let i = 1; i < arr.length; i++) {
+            let currentValue = arr[i];
+            let j;
+            for (j = i - 1; j >= 0 && arr[j] > currentValue; j--) {
+                arr[j + 1] = arr[j];
+            }
+            arr[j + 1] = currentValue;
+        }
+        return arr;
+    }
+
+    function mergeSort(arr) {
+        if (arr.length <= 1) {
+            return arr;
+        }
+        let mid = Math.floor(arr.length / 2);
+        let left = mergeSort(arr.slice(0, mid));
+        let right = mergeSort(arr.slice(mid));
+        return merge(left, right);
+    }
+    
+    function merge(left, right) {
+        let sortedArr = [];
+
+        while (left.length && right.length) {
+            if (left[0] < right[0]) {
+                sortedArr.push(left.shift());
+            } else {
+                sortedArr.push(right.shift());
+            }
+        }
+
+        return [...sortedArr, ...left, ...right];
     }
 
     // Stores the selected sorting agorithm
@@ -358,7 +390,9 @@
         if ($('#algorithm').val() === 'insertion') {
             sortingAlgorithm = insertionSort;
         }
-        console.log("ITT VAGYOK");
+        if ($('#algorithm').val() === 'merge') {
+            sortingAlgorithm = mergeSort;
+        }
     });
 
     animation.record(function(arr) {