fill in arduino section's subsections

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index fc61fee95d080b3d27e6015adfb8a358d95e0de3..be118ad25839dfaab7d462fb433c7eef4fc632ea 100644 (file)
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -6,7 +6,15 @@
  (chapter
   :title [mechanical]
   (section
-   :title [arduino])
+   :title [arduino]
+   (subsection
+    :title [arduino placement])
+   (subsection
+    :title [first hole and screw])
+   (subsection
+    :title [second hole and screw])
+   (subsection
+    :title [third and fourth hole and screw]))
   (section
    :title [battery packs])
   (section