Writing a cn1 code, describe on the next page the structure of a program which implements a simple graphical user interface (gui) consisting of a form with a border layout which has the following components: (1)a single button on the north area, whose label is initially “hello” and which prints the message “world” on the console when pressed; (2)a side menu with a single item which when selected has the effect of changing the button label to “goodbye”; (3)a single container on the center area, on which pressing a pointer causes the background to become red, and releasing the pointer causes the background to become blue.(note: cn1 buttonclass has a method settext(string)to change its label).