private void displayGrid_KeyDown(object sender, KeyEventArgs e)
{
var commands = String.Empty;
if (e.Key == Key.Down)
{
commands = "b";
}
else if (e.Key == Key.Up)
{
commands = "f";
}
else if (e.Key == Key.Right)
{
commands = "r";
}
else if (e.Key == Key.Left)
{
commands = "l";
}
rover.TakeCommands(commands);
PlaceRover();
}
