Alaxwora:
in case of changing push button state from low to high state during the working of project it will automatically move fromfunction ( loop1 ()) to function ( loop2() ) ? or it will keep executing first function ( loop1() )
Why don't you try it and see what happens.
I believe my suggestion will work differently from @UKHeliBob's
You should get into the habit of writing really short programs to try out new concepts before applying them into a serious program.
...R