Random 100 Circles Animation in SwiftUI

ContentView.swift

//
//  ContentView.swift
//  DrawingGroup
//
//  Created by Lee Brimelow on 6/12/19.
//  Copyright © 2019 Lee Brimelow. All rights reserved.
//

import SwiftUI

struct ContentView : View {

    @State var scale: CGFloat = 1

    var body: some View {
        ZStack {
            ForEach((1...100)) { _ in
                Circle()
                    .strokeBorder(Color(red: .random(in: 0...1),
                                  green: .random(in: 0...1),
                                  blue: .random(in: 0...1)),
                            lineWidth: .random(in: 1...20))
                    .blendMode(.colorDodge)
                    .animation(Animation.fluidSpring()
                                .repeatForever()
                                .speed(.random(in: 0.05...0.9))
                                .delay(.random(in: 0...2))
                    )
                    .scaleEffect(self.scale * .random(in: 0.1...3))
                    .frame(width: .random(in: 20...100),
                           height: CGFloat.random(in: 20...100),
                           alignment: .center)
                    .position(CGPoint(x: .random(in: 0...1112),
                                      y: .random(in: 0...834)))
                
            }
            }.onAppear {
                self.scale = 1.2
            }
        .frame(width: 1112, height: 834, alignment: .center)
        .drawingGroup(opaque: false, colorMode: .linear)
    }
}

#if DEBUG
struct ContentView_Previews : PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}
#endif