diff --git a/somefuncs.php b/somefuncs.php
index a493382..0be3b88 100644
--- a/somefuncs.php
+++ b/somefuncs.php
@@ -1,11 +1,31 @@
 <?php
 
+$worlds = [
+    "world-1",
+    "world-2",
+    "world-3",
+    "world-4",
+];
+
+$currentWorld = 0;
+
 function world()
 {
-   return "world";
+   global $currentWorld, $worlds;
+   return $worlds[$currentWorld];
 }
 
 function hello()
 {
-    echo world();
+   echo world();
+}
+
+function setNextWorld()
+{
+   global $currentWorld, $worlds;
+   ++$currentWorld;
+   
+   if ($currentWorld === count($worlds)) {
+      $currentWorld = 0;
+   }
 }