Adding a simple codelab. Hopefully this can be useful in training.

Change-Id: I3bab489d66969e78fd527c7f8f4361228bb20be9
diff --git a/frc971/codelab/basic.cc b/frc971/codelab/basic.cc
new file mode 100644
index 0000000..536384c
--- /dev/null
+++ b/frc971/codelab/basic.cc
@@ -0,0 +1,22 @@
+#include "frc971/codelab/basic.h"
+
+namespace frc971 {
+namespace codelab {
+
+Basic::Basic(BasicQueue *my_basic_queue)
+    : aos::controls::ControlLoop<BasicQueue>(my_basic_queue) {}
+
+void Basic::RunIteration(const BasicQueue::Goal *goal,
+                         const BasicQueue::Position *position,
+                         BasicQueue::Output *output,
+                         BasicQueue::Status *status) {
+  // TODO(you): Set the intake_voltage to 12 Volts when
+  // intake is requested (via intake in goal). Make sure not to set
+  // the motor to anything but 0 V when the limit_sensor is pressed.
+
+  // Ignore: These are to avoid clang warnings.
+  (void)goal, (void)position, (void)output, (void)status;
+}
+
+}  // namespace codelab
+}  // namespace frc971