import SwiftUI

struct StreamView: View {

    @State var streamValues: [String] = []

    @State var nextValue = 0

    var body: some View {
        VStack(spacing: 30) {
           Spacer()
           TunnelView(streamValues: $streamValues)
            Button("Add") {
                self.nextValue += 1
                self.streamValues.append(String(self.nextValue))
            }
            Button("Remove") {
                self.streamValues.remove(at: 0)
            }
            Spacer()
        }
    }
}