struct ContentView: View {
   var body: some View {
      VStack {
         ScrollView(.horizontal, showsIndicators: true) {
            HStack {
               Triangle()
                  .fill(Color.blue)
                  .frame(width: 170, height: 150)
               Triangle()
                  .fill(Color.green)
                  .frame(width: 170, height: 100)
               Triangle()
                  .fill(Color.yellow)
                  .frame(width: 150, height: 180)
               Triangle()
                  .fill(Color.red)
                  .frame(width: 100, height: 150)
            }
         }.padding()
         Spacer()
      }
   }
}