Hi. When I press a button, the whole screen of WINDOW is displayed, and when I press the same button, I want to display it by changing to the next screen. For example, if A key is pressed, screen 1 is displayed. If A key is pressed, screen 2 is pressed. If A key is pressed, screen 3 is pressed. If A key is pressed, screen 4 is pressed, A key is pressed. I want to do it. Is there a reference code for these features? A key is jpg image button