diff --git a/src/arrayMethodSort.js b/src/arrayMethodSort.js
index 32363d0d..62aa6926 100644
--- a/src/arrayMethodSort.js
+++ b/src/arrayMethodSort.js
@@ -4,8 +4,27 @@
  * Implement method Sort
  */
 function applyCustomSort() {
-  [].__proto__.sort2 = function(compareFunction) {
-    // write code here
+  [].__proto__.sort2 = function (compareFunction) {
+    const copy = [...this];
+    let defaultFn = compareFunction;
+
+    if (!compareFunction) {
+      defaultFn = (a, b) => String(a) > String(b);
+    }
+
+    for (let i = 0; i < copy.length; i++) {
+      for (let j = 0; j < copy.length; j++) {
+        if (defaultFn(copy[j], copy[j + 1]) > 0) {
+          [copy[j], copy[j + 1]] = [copy[j + 1], copy[j]];
+        }
+      }
+    }
+
+    for (let i = 0; i < this.length; i++) {
+      this[i] = copy[i];
+    }
+
+    return this;
   };
 }