Random angular gradient animations in SwiftUI

AngularGradientView2.swift

import SwiftUI

struct AngularGradientView2: View {
    var body: some View {
        return VStack {
            CustomAngularGradientView()
        }
        .padding([.leading, .trailing], 30)
        .animation(Animation.linear(duration: 1).repeatForever(autoreverses: false))
    }
}

struct CustomCircle: View {
    @Binding var restart: Bool
    @State var onMode: Bool = false
    
    private func randomColor() -> Color {
        let colors: [Color] = [.red, .yellow, .green, .blue, .purple, .orange]
        let index = Int.random(in: 0...5)
        
        return colors[index]
    }

    private func randomSpectrum() -> Gradient {
        if(restart) {}
        let colors = Array(0...5).map { _ in randomColor() }
        return Gradient(colors: colors)
    }

    private func randomDash() -> CGFloat {
        if(restart) {}
        return CGFloat(Int.random(in: 1...50))
    }
    
    private func randomDegrees() -> Angle {
        if(restart) {}
        return .degrees(Bool.random() ? 0 : 360)
    }

    var body: some View {
        Circle()
            .stroke(style: .init(
                lineWidth: 40,
                dash: [randomDash(), randomDash()],
                dashPhase: onMode ? 0 : 1))
            .fill(AngularGradient(gradient: randomSpectrum(), center: .center))
            .rotationEffect(randomDegrees())
            .onAppear {
                self.onMode = true
            }
    }
}

struct CustomAngularGradientView: View {
    @State var restart = true
    
    var body: some View {
        ZStack {
            CustomCircle(restart: $restart).aspectRatio(1/12, contentMode: .fit)
            CustomCircle(restart: $restart).aspectRatio(1/5, contentMode: .fit)
            CustomCircle(restart: $restart).aspectRatio(1/3.2, contentMode: .fit)
            CustomCircle(restart: $restart)
            CustomCircle(restart: $restart)
        }
        .onAppear {
            Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { _ in
                self.restart.toggle()
            }
        }
    }
}

#if DEBUG
struct AngularGradientView2_Previews: PreviewProvider {
    static var previews: some View {
        AngularGradientView2()
    }
}
#endif