One of the features in Scratch is that you can share your game/simulation/scratch project online. You can post it to the Scratch Site by clicking on the share button when you are working on the file in Scratch.
Here it is as a picture:
You will find a link for Embed on the web page for the scratch program.
The link on the site has single quotes around the link.
http://scratch.mit.edu/projects/connors934/178774'>Learn more about this project