I am assuming that when power is applied, you want to have each LED light in sequence but leave every preceding one on, (so you have 1, 2, 3, 4, 5, 6, 7, 8, 9, then all 10 LEDs lit) then stop and stay with all 10 lit once it gets to the end until power is removed, correct?
What country are you in?
Do you have access to any electronics supplies like a breadboard? Do you know what that is? Are you in school?
With a little more basic information, perhaps we can point you to some basic tutorials.