What do i do to gain muscle and gain a six pack fast and what should i eat?

i am 15 years old and i’m 5’8 i work out 5 times a week i do cardio, stretches, and then i start working out. i work out different muscle groups in certain days. i have a see the 4 pack forming already, what should i do to have a six pack? do i eat a lot of foods with protein after i workout or do i eat a little?
thanks in advance