I need some code ----- xcode12

I will try to do justice to it, show it to me I tried it, the screen turned off and the button stayed on, but I couldn't connect the brightness to a button Because I don't know how At first I was going to link the button and the counter with the volume up and down button, but it is forbidden, then I got this idea

Could you place the order here please Code Block @State var counter: Int = 0    var body: some View {        VStack {            Text("\(counter)")            Button("Count Up") {                counter += 1            }                        Button("Count Down") {                counter -= 1            }                 }     

Type '()' cannot conform to 'View'; only struct/enum/class types can conform to protocols I am showing this error

     ZStack {             LinearGradient(gradient: Gradient(colors: [Color.orange, Color.yellow, Color.white]), startPoint: .top, endPoint: .bottom)                 .edgesIgnoringSafeArea(.all)                 SwiftUIView()                 boton()                                .font(Font.system(size: 80))                     .offset(x: 10, y: -10)                      }         UIScreen.main.brightness = 0.1 // between 0 and 1     } } struct ContentView_Previews: PreviewProvider {     static var previews: some View {         ContentView()     } }

import SwiftUI struct boton: View {          @State var boton : String = "S"     var body: some View {                                            VStack {                          Text("bnvnb: \(boton)")                          Button(action: {                 self.boton = self.boton + "S"                                      } ) {                                  /*@START_MENU_TOKEN@*/Text("Button")/*@END_MENU_TOKEN@*/                                  }                      }              }      }   This is the button file you recalled

I don't know how to arrange the text Sorry, but I want to control the brightness. Can you create a code and slider ? How was this important code with the lighting control feature so that the user can modify the lighting from within the application, not through the system by pulling the tape!