diff --git a/scripts/main.luau b/scripts/main.luau
index d9aa58c..576cd5a 100644
--- a/scripts/main.luau
+++ b/scripts/main.luau
@@ -16,8 +16,8 @@ local speed = 20
 local size = 3
 
 function update(delta: number)
-    x = x + speed * delta * x_direction
-    y = y + speed * delta * y_direction
+    local x = x + speed * delta * x_direction
+    local y = y + speed * delta * y_direction
 
     if x <= size or x >= width - size then
         x_direction = -x_direction
@@ -27,9 +27,9 @@ function update(delta: number)
         y_direction = -y_direction
     end
 
-    color_x = (x / width) * 255
-    color_y = (y / height) * 255
-    color_z = 255 - (color_x + color_y) / 2
+    local color_x = (x / width) * 255
+    local color_y = (y / height) * 255
+    local color_z = 255 - (color_x + color_y) / 2
 
     g13.set_color(color_x/2, color_y/2, color_z/2)