var game = new Crossword(HTML5canvas, columns, rows);
game.clearCanvas(true);

var clue = 'What does a duck say?';
var answer = 'quack';

game.addWord(answer, function(error, clueAnchor, direction) {
  // error is null or an error (answer is too small, too big, cannot be placed etc)
  // clueAnchor is the number used by the system (for example "2" for "2 across")
  // direction is "across" or "down"
});

// advanced language options
game.setNumberTransform(function (n) {
  // convert integer marker to local language
  return tamilNumbers(n);
});

var Canvas = require('canvas');
var Crossword = require('crossword');

var width = 20;
var height = 15;
var canv = new Canvas(40 * width, 40 * height);

var game = new Crossword(canv, width, height);
game.clearCanvas(true);

game.addWord(answer, function(err, clueAnchor, direction) {
  // err = null
  // clueAnchor = 2
  // direction = 'down' or 'across'
});

// right-to-left scripts (Arabic, Hebrew, Divehi)
// in these cases down = top->down, across = right->left
game.setDirection('rtl');