Create a rectangle for each, while its selected paste the code in the website properties as per image below. For the code to be placed in the head give the rectangle the name <head> using the name tag (marked in red in the image)
You don't need to give a name for the body code.
Click image for larger version.  Name: Placeholder_tag.png  Views: 103  Size: 34.5 KB  ID: 77607

scroller.xar