diff --git a/worksheet3.md b/worksheet3.md
index 3d40f64..874457f 100644
--- a/worksheet3.md
+++ b/worksheet3.md
@@ -101,7 +101,7 @@ def output_overlay(output=None, overlay=None):
     new_output.save(output)
 ```
 
-# Overlays cycle
+## Overlays cycle
 
 This code creates a `cycle`. We use the `next()` function on this cycle when the `next_overlay_btn` is pressed in order to receive the next overlay in the list. A cycle is needed because when the end of the list of overlays is reached, we want to automatically begin again with the first overlay.