ReplaceSleepWithDelay.kt

import kotlinx.coroutines.async
import kotlinx.coroutines.delay
import kotlinx.coroutines.runBlocking

suspend fun loadImage200(name: String) {
    delay(2000) // simulate slow behaviour
}

fun loadImage404(name: String) {
    throw RuntimeException("Image not found: $name")
}

fun main() {
    runBlocking {
        try {
            val image1 = async { loadImage200("image1") }
            val image2 = async { loadImage404("image2") }

            image1.await()
            image2.await()
        } catch (e: Exception) {
            println(e)
        }

        println("Sleeping...")
        Thread.sleep(5000)
        println("Loading images done.")
    }
}