diff --git a/src/transformStateWithClones.js b/src/transformStateWithClones.js
index 96d4f7e7e..8c7ff9340 100644
--- a/src/transformStateWithClones.js
+++ b/src/transformStateWithClones.js
@@ -8,6 +8,38 @@
  */
 function transformStateWithClones(state, actions) {
   // write code here
+  const history = [];
+  let currentState = state;
+
+  for (const action of actions) {
+    let nextState;
+
+    switch (action.type) {
+      case 'clear':
+        nextState = {};
+        break;
+
+      case 'addProperties':
+        nextState = { ...currentState, ...action.extraData };
+        break;
+
+      case 'removeProperties':
+        nextState = { ...currentState };
+
+        for (const key of action.keysToRemove) {
+          delete nextState[key];
+        }
+        break;
+
+      default:
+        nextState = { ...currentState };
+    }
+
+    history.push(nextState);
+    currentState = nextState;
+  }
+
+  return history;
 }
 
 module.exports = transformStateWithClones;