The following examples all use the same instance of Gridset.
new Gridset({ width: n, height: n, cols: n, rows: n, });
This is a grid made of divs with a <div /> moving around in it.
This is a grid made in svg with a <rect /> moving around in it.
This is a grid made in canvas with a fillRect moving around in it.
This is a grid made of text with a character ("X") moving around in
it.
Its displayed size is based on the number of columns and
rows, not height & width arguments.