Forum Conditional Template & Usergroup Question

[محروم.كوم]

I want to do this on my template :
If current user (browsing) usergroup id is 1/2/3, display "Hello world",
otherwise, display "Good night".

On the older version of vbulletin (3.8.*), i notice this syntax
Code:

Hello world

But what should i use on the new vb4?
On the online documentation i saw this code
Code:
{vb:if condition, true[, false]}

and
Code:

But i am not sure how to use them on my situation. __DEFINE_LIKE_SHARE__