add: for statement loop exercises

13-loops/exercises/06-infinite-kill/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE: Infinite Kill
+//
+//  1. Create an infinite loop
+//  2. On each step of the loop print a random character.
+//  3. And, sleep for 250 milliseconds.
+//  4. Run the program and wait a couple of seconds
+//     then kill it using CTRL+C keys
+//
+// RESTRICTIONS
+//  1. Print one of those characters randomly: \ / |
+//  2. Before printing a character print also this
+//     escape sequence: \r
+//
+//     Like this: "\r/", or this: "\r|", and so on...
+//
+// HINTS
+//  1. Use `time.Sleep` to sleep.
+//  2. You should pass a `time.Duration` value to it.
+//  3. Check out the Go online documentation for the
+//     `Millisecond` constant.
+//  4. When printing, do not use a newline! Or a Println!
+//     Use Print or Printf instead.
+//
+// NOTE
+//  If this exercise is hard for you now, wait until the
+//  lucky number lecture. Even then so, then just skip it.
+//
+//  You can return back to it afterwards.
+// ---------------------------------------------------------
+
+func main() {
+}