How do you hyperlink?

[trenchdragon]

I want to hyperlink the text to my tumblr blog in my sig, but I don't know how to do it. It's when you turn your words into a clickable link that will take you straight there. How do you do this on TBT?

 

[Jake]

[url=URL here]text[/url]

 

[trenchdragon]

[url=URL here]text[/url]

Thank you!