grid spacing and arch objects

Hello,

I was trying to figure out a quick way to draw multiple objects on a screen and was having some trouble. I wanted to draw 2' diameter circles on a 50'X50' drawing area evenly spaced at 12.5' (3 evenly spaced on each row) apart. I thought the easiest way would to make grid spaced at 12.5' apart but it won't let you do that. Anyone know an easier way. Also, in the architecture tab there is only a few objects to pick from. Where can you get more objects or do you have to make the rest yourself. I know how to put them in there but was just wondering if I could save them from somewehre and just drag them in. Any help would be greatly appreciated.

Thanks,

Brian

check out the array command

THANKS 1st time ive used array