Option A:

[graphics : option]
resolution[0] =	800
resolution[1] =	600
fullscreen =	false
renderer =		"opengl3"
someObject = [: sometype]
	somenumber =	100

Option B:
option graphics = {
	resolution =	{ 800, 600 };
	fullscreen =	false;
	renderer =		"opengl3";
	someObject = sometype { somenumber = 100; };
};