diff --git a/_subsections/sec03/lesson-11.org b/_subsections/sec03/lesson-11.org
index 30793ef..f556e8e 100644
--- a/_subsections/sec03/lesson-11.org
+++ b/_subsections/sec03/lesson-11.org
@@ -1,6 +1,6 @@
#+HTML_HEAD:
#+HTML_HEAD:
-#+title: Section 03 - Lesson 11 | Signals
+#+title: Section 03 - Lesson 11, 12 | Signals, Custom Signals
* Links
- [[../../toc.org][TOC - Godot Notes]]
@@ -8,7 +8,8 @@
- [[https://www.udemy.com/course/jumpstart-to-2d-game-development-godot-4-for-beginners/learn/lecture/45070479#announcements][S03:L23.12 - Custom Signals]]
* Notes
-** signals
+
+** Signals
- messaging system
- way of communicating between nodes
diff --git a/_subsections/sec03/lesson-13.org b/_subsections/sec03/lesson-13.org
new file mode 100644
index 0000000..85e1422
--- /dev/null
+++ b/_subsections/sec03/lesson-13.org
@@ -0,0 +1,9 @@
+#+HTML_HEAD:
+#+HTML_HEAD:
+#+title: Section 03 - Lesson 13 | Spawn Timer
+
+* Links
+- [[../../toc.org][TOC - Godot Notes]]
+- [[https://www.udemy.com/course/jumpstart-to-2d-game-development-godot-4-for-beginners/learn/lecture/45070483#announcements][S03:L22.13 - Spawn Timer]]
+
+* Notes
diff --git a/toc.org b/toc.org
index a95527e..394c89f 100644
--- a/toc.org
+++ b/toc.org
@@ -18,4 +18,5 @@ https://www.udemy.com/course/jumpstart-to-2d-game-development-godot-4-for-beginn
*** [[./_subsections/sec03/lesson-06.org][Lesson 06 | Nodes and Inheritance]]
*** [[./_subsections/sec03/lesson-07.org][Lesson 07, 08 | Moving the Gem, Removing the Gem]]
*** [[./_subsections/sec03/lesson-09.org][Lesson 09 | Export Annotation]]
-*** [[./_subsections/sec03/lesson-11.org][Lesson 11 | Signals]]
+*** [[./_subsections/sec03/lesson-11.org][Lesson 11, 12 | Signals, Custom Signals]]
+*** [[./_subsections/sec03/lesson-13.org][Lesson 13 | Spawn Timer]]