Stored Proc Creation In A Single T-SQL

I have a requirement where i have to create diffferent stored procedures in different databases based on some criteria. The stored procedure creation scripts
will be in a single T SQL variable.Here is something i trying to achieve.( this is just a sample)USE MASTER

GO

declare @SQLString Nvarchar(1000)

declare @STR Nvarchar(1000)

declare @DBName nvarchar(100)

SET @DBName ='DB1'SET @STR='

create proc sptemp

@id int

as

select * from orders where id=@id

go

'

set @SQLString='USE ' + @DBName + char(10) +'GO'

set @SQLString =@SQLString + @str

EXEC (@SQLString)

When i try to run this script in master it is giving me the following errors:

Msg 170, Level 15, State 1, Line 2

Line 2: Incorrect syntax near 'GO'.

Msg 111, Level 15, State 1, Line 3

'CREATE PROCEDURE' must be the first statement in a query batch.

Msg 137, Level 15, State 2, Line 6

Can anyone help me out in this? 

 

Must declare the variable '@id'.