Sleep in 8-bit style

sleep_8bit.kt

fun sleep8bit (second: Int, width: Int=10, callback: (String)->Unit) {
    val d = (second * 1000 / width ).toLong()
    (1..width).forEach {
        Thread.sleep(d)
        val progress = "[${"#".repeat(it)}${" ".repeat(width-it)}]"
        callback(progress)
    }
}