HeartBeat.swift

import SwiftUI
import PlaygroundSupport

struct ContentView: View {
    
    @State private var beating = false
    
    var body: some View {
        Image(systemName: "heart.fill")
            .font(.system(size: 128))
            .foregroundColor(Color(beating ? .systemPink : .systemRed))
            .scaleEffect(beating ? 1 : 1.25)
            .animation(Animation.interpolatingSpring(stiffness: 30
                , damping: 15).repeatForever(autoreverses: false))
            .onAppear(){
                self.beating.toggle()
        }
    }
}
let ContentView_Previews = ContentView()
let vc = UIHostingController(rootView: ContentView_Previews)
PlaygroundPage.current.liveView = vc