Write an Embedded C program to display a pattern on the LEDs.

Output Requirements:

Consider $8$ LEDs from the Board, these LEDs has to glow one by one as if a train bogie coming out of a tunnel every second $($approx$.,$ none without timer implementation$)$from Left to Right as soon as the board is powered on or reset $($Let$$s call it as exit$)$

Once all LEDs are ON$,$ the LEDs should switch OFF one by one as if the train bogie is entering inside a tunnel from Left to Right $($Let$$s call it as entry$).$

Once the exit and entry is complete $,$ Change the direction of the train from Right to Left.

This process of changing direction has to be repeated between every exit and entry of the train.