How to make a ko yugioh deck

To start off you need a minimum of 40 cards containing spells,traps and monsters.If you ask me my deck is made up of 22 monsters 10 spells 10 traps and a extra deck made up of 15 cards. You should first start with the type of deck you want i have a machina deck and if you want more info on how to make a strong deck go to konami.com.