diff --git a/script/demo02_base/MyClass.gd b/script/demo02_base/MyClass.gd
index b147d69..d6352bb 100644
--- a/script/demo02_base/MyClass.gd
+++ b/script/demo02_base/MyClass.gd
@@ -1,6 +1,6 @@
 # extends Node2D
 
-var StringUtils = load("res://util/StringUtils.gd")
+const StringUtils = preload("res://util/StringUtils.gd")
 
 # (optional) class definition with a custom icon
 class_name MyClass, "res://icon.png"
diff --git a/util/RandomUtils.gd b/util/RandomUtils.gd
new file mode 100644
index 0000000..d1d0c67
--- /dev/null
+++ b/util/RandomUtils.gd
@@ -0,0 +1,8 @@
+extends Object
+
+
+const random = [null, false]
+
+static func init():
+	random[0] = RandomNumberGenerator.new()
+