If you don't have one get a photobucket account or something similar. Each picture is given 4 different links. Use the IMG link in your post if you click on it in photobucket it auto copies for you
This is what it looks like on my iPhone when I select the pic
This is what it looks like when you post via website when you paste the link. Now you can add the brackets to your URL too if you so choose
And the result after you hit enter is this
Now keep in mind while building a tank make sure you have helpers lol