Update README.md

Author: argus1

README.md

@@ -3,6 +3,6 @@ ShieldBotBTFlag
 
 [![Open in MATLAB Online](https://www.mathworks.com/images/responsive/global/open-in-matlab-online.svg)](https://matlab.mathworks.com/open/github/v1?repo=argus1/ShieldBotBTFlag)
 
-This is a route following robot used to simulate movement disorders.  The robot used is a differential-drive robot controlled with and arduino board connected to a motor and sensot shield.  The sensors detect the line with IR and pass flags by bluetooth to a monitor on laptop or smartphone.  
+This is a route following robot used to simulate movement disorders.  The robot used is a differential-drive robot controlled with an arduino board connected to a motor and sensor shield.  The code reads IR sensor data to detect a line and adjust the course while passing flags by bluetooth to a monitor on laptop or smartphone.  
 
 ![ShieldBot](https://github.com/argus1/ShieldBotBTFlag/blob/master/Prototype-of-embedded-navigation-system-guided-robot_W640.jpg?raw=true)