Sorry, you are now at the wrong time when the signature code for newbi can no longer be displayed on your profile.
Theymos has made rules and newbi is now unable to sign. I hope you can understand that.
You will be able to use a signature when:

• Get at least 1 merit and
• Your activity has reached 30

If you get 1 merit, then when you reach activity 30 it will make you a junior member and that is when you can use the signature. But if you dont get any merit, even though your activity has passed 30, then you wont be able to use a signature.