Hillcres-Hellio:
pinMode (buttonPin[15, 14, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13], INPUT);
read again post #8 to see how to use a for loop (but that code is not OK for the array as @Wawa got confused with the array index and pins... 
)
Hillcres-Hellio:
pinMode (buttonPin[15, 14, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13], INPUT);
read again post #8 to see how to use a for loop (but that code is not OK for the array as @Wawa got confused with the array index and pins... )