I want to create an application with a counter and a number so that every time I press the button the number increases 1 2 0 .. Then I want to call the lighting feature and set it -9 so that the screen is completely dark, but the button remains on! I want to link the lights to a button as a kind of energy saving so that when I press it, the screen turns off while the application and the button remain on

hello I want to create an application with a counter and a pressure button and start the meter, and I want to link the button to the Volume Up and Down button so that if the meter is 0 and press the volume button it becomes 1 and so on