@ ivan - create a new thread with your question rather than polluting this one,
It will be easier to read if you use the code tags make the code more readable
Code:
like this - by pressing the '#' button in the menu bar while writing the post
Also, while Paul knows many answers addressing your question at him means you cut yourself off from everybody else who might help, if being polite address the forum as a whole.
When you create the new thread, can you add:
Do you see serial print at all from other code, such as the serial print examples
Have you confirmed the input switch works correctly (by say digitalreading f7 and writing to the LED)
The actual code is also a problem since it spends most of it's time with interupts disabled while the tipper detection depends on interupts working. This can probably be re written as a very simple modification of the digital input example.