Running tasks in parallel

tasks.cs

            var spinner = new Action<int, string>((ms, name) =>
            {
                var start = DateTime.Now;
                while (true)
                {
                    var now = DateTime.Now;
                    if ((now - start).Milliseconds > ms)
                    {
                        Console.WriteLine($"[{name}]");
                        start = now;
                    }
                    Thread.Sleep((now - start).Milliseconds);
                }
            });

            var t1 = Task.Run(async () => spinner(750, "750"));
            var t2 = Task.Run(async () => spinner(1000, "1000"));
            var t3 = Task.Run(async () => spinner(2000, "2000"));

            await Task.WhenAll(t1, t2, t3);