diff --git a/packages/effect-fc/src/Lens.ts b/packages/effect-fc/src/Lens.ts
index 50b46d7..dc73344 100644
--- a/packages/effect-fc/src/Lens.ts
+++ b/packages/effect-fc/src/Lens.ts
@@ -271,8 +271,11 @@ export const updateAndGetEffect: {
 
 
 Effect.gen(function*() {
-    const myChunkRef = yield* SubscriptionRef.make(Chunk.make(12, 38, 69) as Chunk.Chunk<number>)
-    const chunkValueLens = myChunkRef.pipe(
+    const ref = yield* SubscriptionRef.make({
+        values: [13, 69, 1488]
+    })
+
+    const myValueLens = myChunkRef.pipe(
         fromSubscriptionRef,
         mapChunkAt(1),
     )