private static Vector3[] CreateColors()
{
var topLeft = new Vector3(1f, 0f, 0f);
var topRight = new Vector3(0f, 1f, 0f);
var bottomLeft = new Vector3(0f, 0f, 1f);
var bottomRight = new Vector3(1f, 1f, 0f);
return new[] { topLeft, topRight, bottomLeft, bottomRight };
}