public override void _Ready()
{
walker = new Walker();
walker.SetXY(GetViewportRect().Size / 2);
AddChild(walker);
var canvas = new DrawCanvas((pen) => pen.DrawRect(walker.GetStepRect(), Colors.LightCyan, true));
canvas.QueueClearDrawing(Color.Color8(45, 45, 45));
AddChild(canvas);
}