try {
lastTick = Math.max(0, Integer.parseInt(sign.getLine(2).trim()));
} catch (Exception e) {
sign.setLine(2, String.valueOf(0));
sign.update(false);
}
oldTick = lastTick;
Block b = SignUtil.getBackBlock(event.getBlock());
Block fire = b.getRelative(0, 1, 0);
Block cb = b.getRelative(0, 2, 0);