Create a building or simple fort. And then have it converted in to a script, so when I paste down the script all the blocks will appear?
Kenetec, the owner of Scripting Helpers, made one just for this! Because the plugin is not in his plugins folder on roblox, you can download his with the link below, or find a plugin on roblox with the same functionality. (They're named "M2S") ('model to script') http://onlinespace.jimdo.com/app/download/7109206586/M2S.rar?t=1354979331 Place the folder inside of the .rar file inside of your plugins folder.
If you need further details post a comment under this answer.