Hello and welcome to the Arduino world.
First off, please read the "how to" at the top of each Forum. There, you would have learned how to properly put your code in an inquiry.
Second, the Arduino will automatically run the "Setup" function once. It will then continually run the "Loop" part of the program.
What you Need to do is move the code that does the crushing either inside an "If" structure, or better yet, to a function of ist own.
Secondly, within the Loop function, test if the button is pressed and if it is pressed, either execute the code you already have, or make a call to the function I recommend you create.
If you Need further assistance detecting the button press, debouncing it, etc. please search the Forum before posting the question. The answers are all already there.