I wanted to post this script because I was only able to figure it out after browsing the forum here. Thanks for all the help and maybe this will help someone else out.
I was asked to figure out a way to open a list of websites and take a screenshot of them so that the ‘decision makers’ could see what a site looked like outside of an email and in a real world situation. I’d never used AppleScript before and figured this would be a good learning experience. This script opens a site, pauses 3 seconds, takes a screenshot then moves on to the next site.
set the URL_list to {"http://intranet", "http://xkcd.com", "http://arstechnica.com"}
property N : 0
repeat with i in URL_list
tell application "Safari"
make new document at end of documents
set URL of document 1 to i
end tell
delay 3
set N to N + 1
set picPath to ((POSIX path of (path to desktop)) & "Picture_" & N & ".png") as string
do shell script "screencapture -tpng " & quoted form of picPath
end repeat