[Plugin: execphp] setting a top margin

Hey, I’m a newbie here and this is my first post. I’ve only been working with WordPress for a few weeks now, and still struggling.

I have a question, how do I set a top margin for the code in execphp.

After installing the widget, I dragged it over to the main_sidebar display and dropped it in. I then copied my “Text Links” add code into the box in the PHP widget. The banner displayed in the upper right corner. I added at the beginning and end of the code the <center> and </center> commands. Which centered up the banner ad, but it still has not top border. I added the <p> at the very beginning before the <center> and it dropped it down in the box so it was almost centered, when I add the </P> command to the end of the code, it puts an even bigger gap at the bottom of the ad.

Question: does anyone know what tags/commands I would add at the beginning and end of the code to get the banner add to center up in the side bar box?

Thanks