[1.7.10]How do I add a delay to my script?

[Caleb6801]

Hi, so I have a script that adds a potion to the player when holding the item, but it constantly adding the effect so it gives it no time to count down. All I want is a simple line of code that delays the script for 2 seconds l, giving it enough time for the potion to count down for a little bit.

[Failender]

http://www.minecraftforge.net/forum/index.php/topic,30515.0.html