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): Script Tile: Forward and Turn Tiles in One Scriptor. Click the green clock to start and stop the script. Draw a leaf and use its Halo's cyan handle to open a Viewer. Drag out a forward by 5 tile and drop it to form a script.
Make a turn by 5 script.
Start and stop the scripts. or. . . Both tiles can be in one Scriptor.
Change the numbers too.