diff --git a/src/transformStateWithClones.js b/src/transformStateWithClones.js
index 96d4f7e7e..36f3d30bd 100644
--- a/src/transformStateWithClones.js
+++ b/src/transformStateWithClones.js
@@ -7,7 +7,40 @@
  * @return {Object[]}
  */
 function transformStateWithClones(state, actions) {
-  // write code here
+  let currentState = { ...state };
+  const history = [];
+
+  for (const action of actions) {
+    let nextState = { ...currentState };
+
+    switch (action.type) {
+      case 'addProperties':
+        if (action.extraData && typeof action.extraData === 'object') {
+          nextState = { ...currentState, ...action.extraData };
+        }
+        break;
+
+      case 'removeProperties':
+        if (Array.isArray(action.keysToRemove)) {
+          for (const key of action.keysToRemove) {
+            delete nextState[key];
+          }
+        }
+        break;
+
+      case 'clear':
+        nextState = {};
+        break;
+
+      default:
+        continue;
+    }
+
+    history.push(nextState);
+    currentState = nextState;
+  }
+
+  return history;
 }
 
 module.exports = transformStateWithClones;