setTimeout

hello, hello... 
i have one problem... no wait i have many problem and other problems, later other problems
okay 
i have are mod technium  
i create big upgrade  and... i have problem, this problem is big 

i create tool, this tool have procedure  to remove leaves
and... 
procedure not have pauses,  procedure can't found leaves and stopt
and else world have too many leaves, player activated procedure and crashed  
you know other popular mods, maybe you know "Botania" magic flowers, this mod have terra axe procedure is similar and this item have timer is not so faster
pls... help me create procedure activated pauses 
i cnow how it work 
but i can't write it right 

tutorial code

function sayHi() {
  alert('Hello');
}

setTimeout(sayHi, 1000);

version  1.12.2 
sorry me, i from ukraine, my english not so good