new_tile = (num, x, y) ->
letter = new_letter()
- hp = 1 + Math.floor(Math.random() * (HP_MAX - 1))
+ hp = 4 + Math.floor(Math.random() * (HP_MAX - 4))
html_tile = $("<div class=\"tile hp#{hp}\" style=\"left: #{x}px; top: #{y}px\" unselectable=\"on\">#{letter}</div>")
$board.append(html_tile)