What do you have so far? (That means show your code.)

woops I forgot that. Here it is

Okay- what you want with triangles flying around seems a bit complicated...

There are two ways to approach this:

The preferred, advanced way, using an array of classes (see OOP); which is likely beyond what you will be able to do right now, or:

The alternative way, using several Arrays to store information; for example, and array of x positions, an array of y positions, and an array of rotations; these are essentially the same, except the latter does not broach the OOP boundary.

Either way, you'll probably have to do some reading...

Then, you'll need to find a way to reference that information and display it; referencing the array and drawing triangles.
Then you have to implement collision detection...

I suggest that you get started with creating the data and loading it...

If it is not absolutely necessary, maybe instead of triangles you could use circles for a first time making something like this. Circles are very easy to do collisions with, you just use the Pythagorean theorem. For example, pretend your object you are controlling is a circle instead of a square and you define it as:

thank you both for your help. I think i'm understanding the concept but one error keeps popping up. The code looks like this the error is.. java.lang.NullPointerException. Thanks for all your help!

You have an entire block of code and two variable declarations stored outside a function - move that close curly brace around and it should work. Hint: use Edit > Auto Format...

could you be more specific please? I'm having trouble locating what you are talking about. Thanks!

never mind. I figured it out. Thank you very much!