To extend over a wide area
At the start of each level this grid contains a certain number of colored cubes strew about, and every so often a couple of unmovable cement cubes as well.
Straw (from strew, as being used for strewing), is the general term applied to the stalky residue of grain-plants (especially wheat, rye, oats, barley).
The ultimate root is unknown, but may be connected with that meaning " to strew," and the word would thus mean the points of light scattered over the heavens.
notuma bene, Visitors are at liberty to take what flowers they might want to strew over the grave.