Lesson-5.markdown

@@ -42,6 +42,9 @@ A video of the end result is seen in [XXX]. This video shows that the Lego robot
 
 ![Output of the light sensor when performing self-balancing](https://gitlab.au.dk/rene2014/lego/raw/master/Lesson5/Images/LightMeasurements.png)
 
+This image shows the PID controllers offset as the red line and the output of the light sensor as the the blue graph.
+
+
  
 ### Exercise 2, Self-balancing robots with color sensor