var selection = (function(){

	var selection = new Matrix (1, 1, function(x,y){
		var lex = new Lex (x,y)
		lex.build()
		return lex
	})

  // in selection mode..
  // - we start by clicking the canvas. this positions the selection, and copies
  //   the character
  // - then we drag down and to the right. this resizes the selection and pushes new
  //   rows and columns. each of these copies the character underneath.
  // - on mouseup, the selection is locked. then..
  // - drag the selection to move it -- this "cuts" it and leaves a blank space on the canvas.
  // - shift-drag the selection to copy it
  

	return selection

})()