add subsections to left motor section

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index 33f54fcc8c337ee3933a4d51e63e92278cf4fce5..82938c5b365bf9d4b9adcdf9d60dc374a42d5f22 100644 (file)
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -75,7 +75,13 @@
     :title [breadboard power rail]
     (p [power rail can provide power to more than one device.])))
   (section
-   :title [left motor])
+   :title [left motor]
+   (subsection
+    :title [arduino digital output])
+   (subsection
+    :title [quad half h bridge, aka motor controller])
+   (subsection
+    :title [motor battery]))
   (section
    :title [both motors])
   (section