Add link in the README, add photo of the button/light board.

CooperativeMultitasking.md

@@ -67,6 +67,9 @@ of small microcontrollers, including
 techniques (Puolop PB150, Padauk PxS15x, Bojuxing BJ8P, 
 Yspring MDT1x, EastSoft HR7P, Holtek Ht68.)*
 
+![Here](blb.jpg) is a typical board hosting 12 buttons, 12 RGB LEDs, all hosted
+by an STM32. Every light and button can be controlled separately 
+and simultaneously, using the technique described in this paper.
 </details>
 
 ## The Problem

README.md

@@ -1,4 +1,5 @@
-This is a web-based article describing *cooperative multitasking*, also known as
+This is a [web-based article](CooperativeMultitasking.md) 
+describing *cooperative multitasking*, also known as
 *event driven programming*. The method described here is small enough to fit on
 many sub-$1 microcontrollers, those without memory management units. Examples are 
 the STM32, STM8, PY32, AtMega, AtTiny, 8051 and Pic microcontrollers.
@@ -6,9 +7,11 @@ the STM32, STM8, PY32, AtMega, AtTiny, 8051 and Pic microcontrollers.
 With this code structure in place, these tiny microcontrollers can be made to 
 perform multiple separate tasks, apparantly independent from each other.
 
-The reader is walked through the elements of the build, and is then given a fully-implemented
+The reader is walked through the elements of the build, 
+and is then given a fully-implemented
 block of code. The 2nd half of the article builds on the basis, with lots of 
 examples of state-machines and modifications to allow for cleaner code.
 
-The audience for this article is anyone interested in writing code for small micro-controllers.
+The audience for this article is anyone interested in 
+writing code for small micro-controllers.
 A background in any programming language would help (*C, Rust, Python*).