Skript Version: 2.5-alpha3
Skript Author: Bensku
Minecraft Version: 1.14.4

Code (Text):

1. command /flytodeath:
2.     permission: flytodeath.use
3.     trigger:
4.         apply levitation 4 to the player for 14 seconds
5.         wait 15 seconds
6.         make console execute command "kill %player%"

I will be putting this command, in a command block where a player will step on a pressure plate, and receive the effects from the command.
However, I do not know how to do so. Help will be greatly appreciated.

I tried /flytodeath <player>
however @p won't work with it.

 

You're amazing ty