when I click on this link https://developer.apple.com/app-clips/resources/ on click on app clip generator it takes me to downloads page but there is no software.

there is a way to adjust the device brightness by pressing a button but that will not work like you want it to.

I don't think there is a way to adjust lighting but here is how to make a counter @State var counter: Int = 0     var body: some View {         VStack {             Text("\(counter)")             Button("Count Up") {                 counter += 1             }                          Button("Count Down") {                 counter -= 1             }                   }      

This should work. struct ContentView: View {     @State var testvar:Double = 66.78     var body: some View {         Text("\(testvar)") } }