Script to close the oldest open order

[Scott Gibbons]

Hi, I been using hotkeys to buy/sell X amount of lots with scripts and using a "Close All" script to close an entire position of multiple orders. But what if I want to close only 1 order at a time? 
I found this topic to close the oldest 5 orders but it seems incomplete and part of the codes used might be out of date and dont compile.
Can anyone help me with this script I'm not much of a coder.
https://www.mql5.com/en/forum/142093