I'm making a code so I can drive my little car via Bluetooth. I want 1 button to activate a loop and the other button to stop that loop(I'm talking about blinking lights or a little song with a zoomer). I tried to do so via a simple loop but I have to fill the "Times" in, this way I can't stop the loop while the amount isn't done yet...
Sorry if my sentences aren't that great 
I'm from Belgium so 
Hopefully someone can help me
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itzme:
I want 1 button to activate a loop and the other button to stop that loop
That's probably not a good way to approach the problem.
Have a look at how the code is organized in Several Things at a Time
Note how each function runs very briefly and returns to loop() so the next one can be called. None of the functions tries to complete a task in one call. And there may be dozens of calls to a function before it is actually time for it to do anything.
Use the buttons to change the value of a variable.
Use the value of the variable to determine which parts of the program are active.
...R