Development Assistance Help with countdown using TitleAPI

Hy guys i'm looking for anyone that can help me!I'd like to know ho create a countdown that starts at command /countdown [int] ! For example if i do /countdown 10 ,will start a countdown that allerts you every second until it finish.. But when countdown starts,it will appear on your monitor a Title,as 10,9,8,7,6,5,4,3,2,1,Go!
But i can also do /countdown 15/20/30/40 or any other number!

 

1) To countdown start a BukkitRunnable and int check if Time is higher that 0 else cancel
2) Use a tittle api it will be easier.

 

@MaTaMoR_ i'm noob with this..can you code me this?

 

No, you have to code it by yourself, but i will help you a little bit

Code:

//I will show how to create a BukkitRunnable
//You will need a player and the time
new BukkitRunnable() {
    int time = /time/
    public void run() {
         //Count down stuff
    }
}.runTaskTimer(instance, 0, 20);

 

i can do as :
for(i = 0, i = args[0], i--)
{
}

 

Code:

if(int > 0) {
   message;
} else {
   end message;
   cancel;
}

 

@MaTaMoR_ i did it,i use a new TitleApi found on internet,this is the project,but can you say me why it give error in console?
Project ----> https://www.dropbox.com/home/Countdown
Error ---->

Error (open) Error (close)

[17:07:39] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'countdown' in plugin Countdown v1.0
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-1649]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:181) ~[spigot.jar:git-Spigot-1649]
at org.bukkit.craftbukkit.v1_7_R4.CraftServer.dispatchCommand(CraftServer.java:767) ~[spigot.jar:git-Spigot-1649]
at net.minecraft.server.v1_7_R4.PlayerConnection.handleCommand(PlayerConnection.java:1043) [spigot.jar:git-Spigot-1649]
at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:880) [spigot.jar:git-Spigot-1649]
at net.minecraft.server.v1_7_R4.PacketPlayInChat.a(PacketPlayInChat.java:28) [spigot.jar:git-Spigot-1649]
at net.minecraft.server.v1_7_R4.PacketPlayInChat.handle(PacketPlayInChat.java:65) [spigot.jar:git-Spigot-1649]
at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:186) [spigot.jar:git-Spigot-1649]
at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:81) [spigot.jar:git-Spigot-1649]
at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:734) [spigot.jar:git-Spigot-1649]
at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [spigot.jar:git-Spigot-1649]
at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [spigot.jar:git-Spigot-1649]
at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [spigot.jar:git-Spigot-1649]
at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot.jar:git-Spigot-1649]
Caused by: java.lang.IllegalArgumentException: Plugin cannot be null
at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot.jar:git-Spigot-1649]
at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftScheduler.validate(CraftScheduler.java:397) ~[spigot.jar:git-Spigot-1649]
at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftScheduler.runTaskTimer(CraftScheduler.java:123) ~[spigot.jar:git-Spigot-1649]
at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftScheduler.scheduleSyncRepeatingTask(CraftScheduler.java:119) ~[spigot.jar:git-Spigot-1649]
at org.altervista.sistem21.CountCommand.startTask(CountCommand.java:46) ~[?:?]
at org.altervista.sistem21.CountCommand.onCommand(CountCommand.java:29) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-1649]
... 13 more

 

Your plugin is null

 

I'm very stupid,i forgot to initialize plugin instance
Thank you,now it works,but can you tell me how i send a title when the countdown finishs?
@MaTaMoR_