Simple circle content view

ContentView.swift

import SwiftUI

struct ContentView: View {
    @State var xpos: CGFloat = 400
    @State var ypos: CGFloat = 200
    
    var body: some View {
        ZStack {
            Circle()
                .frame(width: 50, height: 50)
                .foregroundColor(.blue)
                .position(x: xpos, y: ypos)
        }
        .frame(width: 800, height: 800)
        .background(.white)
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}