diff --git a/index.js b/index.js
index 7dca45f..d1f9c9a 100644
--- a/index.js
+++ b/index.js
@@ -1,26 +1,49 @@
-module.exports = {
+let eventCollection = {};
 
-    /**
-     * @param {String} event
-     * @param {Object} subscriber
-     * @param {Function} handler
-     */
-    on: function (event, subscriber, handler) {
+module.exports = {
+  /**
+   * @param {String} event
+   * @param {Object} subscriber
+   * @param {Function} handler
+   */
+  on: function (event, subscriber, handler) {
+    if (!eventCollection[event]) {
+      eventCollection[event] = [[subscriber, handler]];
+    } else {
+      eventCollection[event].push([subscriber, handler]);
+    }
 
-    },
+    return this;
+  },
 
-    /**
-     * @param {String} event
-     * @param {Object} subscriber
-     */
-    off: function (event, subscriber) {
+  /**
+   * @param {String} event
+   * @param {Object} subscriber
+   */
+  off: function (event, subscriber) {
+    if (eventCollection[event]) {
+      for (let key in eventCollection[event]) {
+        if (eventCollection[event][key][0] === subscriber) {
+          delete eventCollection[event][key];
+        }
+      }
 
-    },
+      if (Object.keys(eventCollection[event]).length == 0) {
+        delete eventCollection[event];
+      }
+    }
 
-    /**
-     * @param {String} event
-     */
-    emit: function (event) {
+    return this;
+  },
 
+  /**
+   * @param {String} event
+   */
+  emit: function (event) {
+    for (let key in eventCollection[event]) {
+      eventCollection[event][key][1].call(eventCollection[event][key][0]);
     }
+
+    return this;
+  }
 };