t.align_to (X_AXIS, CENTER);
t.align_to (Y_AXIS, DOWN);
Stencil l = Lookup::filled_box (Box (Interval (-0.01, 0.01),
Interval (-2, -1)));
t.align_to (X_AXIS, CENTER);
t.align_to (Y_AXIS, DOWN);
Stencil l = Lookup::filled_box (Box (Interval (-0.01, 0.01),
Interval (-2, -1)));