1 files changed, 35 insertions, 23 deletions
diff --git a/lib/serpentity/system.js b/lib/serpentity/system.js
index c817be1..339f6e7 100644
--- a/lib/serpentity/system.js
+++ b/lib/serpentity/system.js
@@ -1,32 +1,44 @@
+'use strict';
+
+/* global Serpentity */
+
 /*
  * Systems contain most of the logic, and work with nodes in order to
  * act and change their values.
  *
  * You usually want to inherit from this class and override the
- * three methods.
+ * three methods. They are shown here to document the interface.
  */
-Class(Serpentity, "System")({
-    prototype : {
 
-        /*
-         * This will be run when the system is added to the engine
-         */
-        added : function added(engine) {
-          // Override
-        },
+let System = class System {
+
+  /*
+   * This will be run when the system is added to the engine
+   */
+  added () {
+    // Override with added(engine)
+    // Receives an instance of the serpentity engine
+  }
+
+  /*
+   * This will be run when the system is removed from the engine
+   */
+  removed () {
+    // Override with removed(engine)
+    // Receives an instance of the serpentity engine
+  }
 
-        /*
-         * This will be run when the system is removed from the engine
-         */
-        removed : function removed(engine) {
-          // Override
-        },
+  /*
+   * This will run every time the engine's update method is called
+   */
+  update () {
+    // Override with update(dt)
+    // Receives a delta of the time
+  }
+};
 
-        /*
-         * This will run every time the engine's update method is called
-         */
-        update : function update(dt) {
-          // Override
-        }
-    }
-});
+if (typeof module !== 'undefined' && this.module !== module) {
+  module.exports = System;
+} else {
+  Serpentity.System = System;
+}