private void openCrate(Player whoOpened, Crate crateOpened) {
        FileConfiguration crateConfig = getCrateConfig(crateOpened.getName());

        if (crateConfig == null) return;

        List<String> rewards = crateConfig.getStringList("Rewards");
        Map<Integer, String> listOfPercent = new HashMap<>();
        int genNumber;
        int totalPercent = 0;


        if (rewards.size() == 0) return;

        for (String line : rewards) {

            String[] words = line.split(" ");
            String percent = words[0];
            int numPercent;

            if (!percent.contains("%")) continue;

            while (percent.endsWith("%")) {
                // removing the percentage sign at the end
                percent = percent.substring(0, percent.length() - 1);
            }

            try {
                numPercent = Integer.valueOf(percent);
            } catch (NumberFormatException e) {
                getLogger().log(Level.WARNING, "Was unable to parse percent at line '" + line + "' in " + crateOpened.getName() + ".yml");

                continue; // skip the line
            }



            StringBuilder command = new StringBuilder();

            for (int i = 1; i < words.length; i++)
                command.append(words[i]).append(" ");


            totalPercent += numPercent; // shorter for totalPercent = totalPercent + numPercent
            listOfPercent.put(numPercent, command.substring(0, command.length() - 1));

        }
        if (totalPercent < 100)
            totalPercent += (100 - totalPercent);

        genNumber = new Random().nextInt(totalPercent - 1);
        int n = 0;
        int timesLooped = 0;

        int lastPercent = 0;

        while (n <= genNumber) {
            if (timesLooped < listOfPercent.size()) {
                lastPercent = toList(listOfPercent.keySet()).get(timesLooped);
                n = n + lastPercent;
            } else
                lastPercent = -1;

            timesLooped++;
        }

        if (lastPercent != -1) {

            String command = listOfPercent.get(lastPercent);
            getServer().dispatchCommand(getServer().getConsoleSender(), command.replaceAll("%player%", whoOpened.getName()));
        }

        crateOpened.setOpened(crateOpened.getOpened() + 1);
    }