Squeak Etoys is a "media authoring tool"-- software that you can download to your computer
and then use to create your own media. You can write out your project and share it with others.
Etoys runs on any Mac or Windows machine, as well as on the OLPC XO machine.
It is free.
Find out about Etoys.
Text of this guide (for searching): Halo Tools: Rotate an Object with the Blue Halo Handle. Right click on the ant to open the Halo Handles.
Drag the blue halo handle; see the heading change. Click to highlight 45 in the tile below and type in a new heading.
Press Enter and the ant's heading changes. Use the rotate handle to point it back to 45 again. Start the script and draw a letter or number by using the blue rotate handle to change the direction.