-> Display countdown from 10 to 1 on the screen and then display Happy Independence Day on the screen.
x Do not use named functions
x Do not use a set interval function.
x Do not use recursion.
x Do not use IIFEs & named functions.
x Do not use looping.
x Use call back hell to deploy the timer.
x All JavaScript codes should be in a script file named script. js which has to be imported into your HTML page.