How do I use a timer/ delay to make an object or a character move in console window?

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C#

.NET

I'm trying to create a console game where character 'M' as in "Martian" and character 'S' as in "SpaceCreature" stay opposite on both ends on the X axis and move up and down across Y axis.

I use arrow keys to make the 'M' move up and down. But the 'S' should also move but by itself whenever 'M' moves. I need to make the 'S' move at a slower pace to follow the 'M'.

What I have tried:

As of now, I got 'M' moving up and down using arrow keys and 'S' is also moving at the same time.

I need to make the 'S' move slower. I have tried thread.Sleep, but that just makes the 'S' disappear and appear back like a glitch. I think I need to use something called "Console.keyAvailable" but I am finding it hard on where to place that function.

//X and Y get set constructors are defined in the abstract class:-SpaceObject 

public override void Draw()  //In both classes Martian and SpaceCreature
{
   Console.SetCursorPosition(X, Y);
   Console.WriteLine("S");  
   //In Martian class:- Console.WriteLine("M");
}
static void Main(string[] args)
{
   var m = new Martian(100, 10);
   var s = new SpaceShip(100, 10);

   const int MaxY = 25;

   m.Draw();  //Abstract override void method
   s.X = m.X + 100;
   s.Y = m.Y;
   s.Draw(); //Abstract override void method

   ConsoleKeyInfo keyInfo;
   while (true)
   {
      keyInfo = Console.ReadKey(true);
      Console.Clear();
      switch (keyInfo.Key)
      {
         case ConsoleKey.UpArrow:
         if (m.Y > 0)
         {
            m.Y--;
         }
         break;
         case ConsoleKey.DownArrow:
         if (m.Y < MaxY)
         {
            m.Y++;
         }
         break;
         }
         m.Draw();
         s.X = m.X + 100;
         s.Y = m.Y;
         s.Draw();
      }
   }
}