Adding a cooldown to a preexisting skript?

[sulf]

Hey  I have this skript:

command /suicide:
    trigger:
        kill player
        broadcast "&c&l%player% took the easy way out with /suicide."

I want to add a cooldown to this skript so that a player can only use it once every 15 seconds or so. thanks! 

[Witho]

command /suicide:
    cooldown: 15 seconds
    cooldown message: You can do that again in %remaining time%.
    trigger:
        kill player
        broadcast "%player% took the easy way out with /suicide

I hope this works