import SwiftUI

struct ContentView: View {
   var text: AttributedString {
      var attText = AttributedString("Hello World!")
      if let range = attText.range(of: "Hello") {
         attText[range].foregroundColor = .red
         attText[range].font = .system(size: 30)
      }
      return attText
   }
   var body: some View {
      VStack {
         Text(text)
      }
      .padding()
   }
}