Lesson-5.markdown

@@ -360,6 +360,7 @@ Although no specific test of the motor and sensors performance vs battery level
 [Exercise 1] - https://www.youtube.com/watch?v=kqeq5SVmsWQ&feature=youtu.be
 
 [Exercise 2 - Color sensor] - https://www.youtube.com/watch?v=tngSdW6aB80
+
 [Exercise 2 - Light sensor] - https://youtu.be/b9SHS9YStsw
 
 [Exercise 3.1] - http://youtu.be/fDe9IyF4uy8