Urgent Care :: how to make a nesting box/basking area

[jasoncop954]

Hello I have 4 adult turtles 3 females 1 male
I need to know how to make a basking area/nesting these are wild caught so good chance female might be gravid since I saw them mating male and female they live in a 90 gallon tank I need to know how much water and how to make a basking area please help
I am only 16 I love my turtles please help
All I have is a tank basking light I think uvb
What else do I need please help thanks

[Leo&Donny]

I would just advise to get a submersible heater and some type of filtration filter to help keep the tank clean. You will need to have some type of basking area big enough for all of them.