Swift Playground View Malfunction

Hi Everyone!

I am new in swift programming. For a project I have to create a view in a swift playground. I just started when I hit a wall. When I use this code

import SwiftUI
import PlaygroundSupport
struct ProgressView: View {
    var body: some View
        Circle()
            .stroke(lineWidth: 40)
            .foregroundColor(.blue)
    }
}
PlaygroundPage.current.setLiveView(ProgressView())

It just creates a tiny square at the top. Please guide me why this is not working and what should I do to fix it. Please reply ASAP.