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

Change-Id: I3bab489d66969e78fd527c7f8f4361228bb20be9
diff --git a/frc971/codelab/BUILD b/frc971/codelab/BUILD
new file mode 100644
index 0000000..2823200
--- /dev/null
+++ b/frc971/codelab/BUILD
@@ -0,0 +1,39 @@
+package(default_visibility = ['//visibility:public'])
+
+load('//aos/build:queues.bzl', 'queue_library')
+
+cc_binary(
+  name = 'basic_test',
+  srcs = ['basic_test.cc'],
+  deps = [
+    ':basic_queue',
+    ':basic',
+    '//aos/testing:googletest',
+    '//aos/common:queues',
+    '//aos/common/controls:control_loop_test',
+    '//frc971/control_loops:state_feedback_loop',
+    '//frc971/control_loops:team_number_test_environment',
+  ],
+  testonly = 1,
+)
+
+cc_library(
+  name = 'basic',
+  srcs = ['basic.cc'],
+  hdrs = ['basic.h'],
+  deps = [
+    ':basic_queue',
+    '//aos/common/controls:control_loop',
+  ],
+)
+
+queue_library(
+  name = 'basic_queue',
+  srcs = [
+    'basic.q',
+  ],
+  deps = [
+    '//aos/common/controls:control_loop_queues',
+    '//frc971/control_loops:queues',
+  ],
+)