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In your day to day life, you must have come across the term 'coding'.                        Stop
            Have you wondered what it means. In this chapter, you are going to
            learn what is coding and its usage in day to day life.

            What is a Traffic Light System?                                                             Wait

            While going to school, you must have seen a traffic light.
            Traffic lights are devices that control the traffic through the use of
                                                                                                         Go
            colours.  These  lights  are  placed  at  road  intersections,  pedestrian
            crossing for smooth traffic flow.

            How do Traffic Lights Work?

            In traffic light, the lights cycle through green (allows traffic to proceed in the direction
            denoted), yellow (warns that the signal is about to change to red), and red (stops traffic from
            proceeding) at regular intervals of time. Traffic lights help to prevent accidents and congestion
            on the roads.

            How do the Traffic Lights Change Automatically?

            Traffic lights contain sensors which are programmed to calculate how many cars or pedestrians are
            present at a specific point.
            At regular intervals of time, the code automatically changes the traffic signals to show colors (red,
            yellow, green).





                     John Peake Knight invented the first traffic light, after that William Potts
                     invented the modern three-lens traffic light and Garrett Morgan invented the
                     first automatic traffic light.




            Where Else do we See Applications of Coding?

            These days a lot of our daily lives rely on coding. We are somehow connected through coding. For
            example, the smartphones, computers, videogames, car dashboards, etc. are all using some sort of
            code to perform its task.















                    Bar code scanner                    Booking tickets                       Printer




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