diff --git a/examples/bare4.rs b/examples/bare4.rs
index 75fec4e08efcd477b35fd17df4e5acb38e74071a..37dd6fc13605b0497402ad4e018f08f610cc9177 100644
--- a/examples/bare4.rs
+++ b/examples/bare4.rs
@@ -84,7 +84,7 @@ fn main() -> ! {
 //
 // 1.  Did you enjoy the blinking?
 //
-//    ** your answer here **
+//    Yes, the blinking was nice!
 //
 //    Now lookup the data-sheets, and read each section referred,
 //    6.3.11, 8.4.1, 8.4.7
@@ -92,6 +92,12 @@ fn main() -> ! {
 //    Document each low level access *code* by the appropriate section in the
 //    data sheet.
 //
+//    6.3.11: RCC_APB1ENR
+//
+//    8.4.1: GPIOx_MODER where x can be A-E and H
+//
+//    8.4.7: GPIOx_BSRR where x can be A-E and H
+//
 //    Commit your answers (bare4_1)
 //
 // 2. Comment out line 40 and uncomment line 41 (essentially omitting the `unsafe`)