Correct Syntax

Hi.

This is a Stored proc I am working on
I dont know much about stored procs.
This is what I am trying to achieve
The proc takes two input parameter and returns one outparameter.

This is what I have

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

CREATE PROCEDURE [dbo].[GetNextAction]

(
@Code char(10),
@Track varchar(30),
@NextAction ntext output
)
AS
BEGIN

SET NOCOUNT ON;
Declare @ID int;
@ID = Select Sequence from [dbo].[Track] where Code=@Code;
Declare @nextCode varchar;
@nextCode= Select Code from [dbo].[Track] where sequence =(@ID+1);
@NextAction= Select nextAction from [dbo].[CaseStage] where Code=@nextCode;
return @NextAction;


END
GO

I guess you can understand what I am trying in the proc but the rules and syntax are wrong. Please help me with this.
Thanks