A really simple macro,my apologies,i'm noob...

[Enigma7]

Hi guys, i would like to know how to make a very simple macro,i need to spam the key "K", possibly every 0,1 - 0,2 seconds (anything that is between in the range of 5-10 press per seconds is fine)
so,i need to spam "K", infinite loop that and having another key to start/stop the macro.

Thanks to everyone in advance! 
Big hugs from Italy! 

P.s. I promise I'll start studying how the program works,but right now i'm a little bit in a hurry and i never used it

Edited January 5 by Enigma7

[Ego]

Why?

Need some input as to what game you wish to use what you want to do.