using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
namespace ConsoleApplication23
{
        internal class Program
        {
            private static void Main()
            {
                var point = new Point(x: 1, y: 1, size: 1);
                Print(point);
                while (true)
                {
                    var key = Console.ReadKey().Key;
                    switch (key)
                    {
                        case ConsoleKey.UpArrow:
                            point.Direction = Direction.Up;
                            break;
                        case ConsoleKey.DownArrow:
                            point.Direction = Direction.Down;
                            break;
                        case ConsoleKey.LeftArrow:
                            point.Direction = Direction.Left;
                            break;
                        case ConsoleKey.RightArrow:
                            point.Direction = Direction.Right;
                            break;
                    }
                    point.Move(1);
                    Print(point);
                }
            }

            private static void Print(Point point)
            {
                Console.Clear();
                for (var i = 0; i < point.Size; i++)
                {
                    Console.SetCursorPosition(point[i].X, point[i].Y);
                    Console.WriteLine (i == 0 ? "*+*":"");
                }
            }
        }

        internal class Point
        {
            private readonly List<Segment> seg;

            public Point(int x, int y, uint size)
            {
                if (size == 0)
                    throw new ArgumentException();
                seg = new List<Segment>();
                for (var i = 0; i < size; i++)
                    seg.Add(new Segment(x, y + i));
                Direction = Direction.Up;
            }

            public Direction Direction { get; set; }

            public int Size
            {
                get { return seg.Count; }
            }

            public Segment this[int ind]
            {
                get { return seg[ind]; }
            }

            public void Move(int flash)
            {
                int x = 0, y = 0;
                switch (Direction)
                {
                    case Direction.Up:
                        y = -flash;
                        break;
                    case Direction.Down:
                        y = flash;
                        break;
                    case Direction.Left:
                        x = -flash;
                        break;
                    case Direction.Right:
                        x = flash;
                        break;
                }
                for (var i = Size - 1; i >= 1; i--)
                {
                    seg[i].X = seg[i - 1].X;
                    seg[i].Y = seg[i - 1].Y;
                }
                seg[0].X += x;
                seg[0].Y += y;
            }
        }

        internal class Segment
        {
            public Segment(int x = 0, int y = 0)
            {
                X = x;
                Y = y;
            }

            public int X { get; set; }
            public int Y { get; set; }
        }

        internal enum Direction
        {
            Up,Down,Left,Right
        }
    }