CircleAnimation modifier

ContentView.swift

struct CircleAnimation: AnimatableModifier {
    var angle: Float
    var radius: Float

    var animatableData: Float {
        get { angle }
        set { angle = newValue }
    }

    func body(content: Content) -> some View {
        let x = CGFloat(400 + radius * cos(angle))
        let y = CGFloat(400 - radius * sin(angle))
        content.position(x: x, y: y)
    }
}