This simple plugin shows how to do the following:

1. Access handlers in a plugin and use RBscript.

2. The Circles_Field handler draws 1000 circles on a canvas and sends its count to a field that. 
Note the field flashes badly. Also the field is quicker when set to read-only mode.

3. The Circles_Text handler also draws 1000 on the canvas but sends its count to a Text object 
which does not flash and is also much faster to access than a field.

4. The RBscript draws 10000 circles but cannot access the text or field.
The file  Circles_PI.xcm  is a built version - simply drop it into your plugin folder.
