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    In your day to day life, you must have come across the term 'coding'. 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?                                                    Stop

                      While going to school, you must have seen a traffic light.

                      Traffic  lights are devices that  control traffic through the use of                        Wait
                      colours. These lights are placed at road intersections and pedestrian
                      crossings for smooth traffic flow.
                                                                                                                   Go
                      HOW DO TRAFFIC LIGHTS WORK?
                      In a 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).

                                                                                                               PURE
                         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.  FACT

                                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, smartphones, computers, videogames, car dashboards, etc., are all using some sort of

                      code to perform their tasks.

                              Bar code scanner                    Booking tickets                       Printer

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