The Controls:

The 3 scroll bars adjust the initial inner radius, outer radius and the number of total Divisions.  Then the 3 buttons and 2 check boxes control the appearances.

The Scrolls:

Radius 1 goes from -250 to 250 pixels.  
Radius 2 goes from -250 to 250 pixels. 
Divisions range from 0 to 100, in increments of 2.
 
The Buttons:

Draw Frame draws one at the current settings, with random RGB frame.
Draw Filled draws one at the current settings, with random RGB fill and black frame.
Clear All Splats clears the drawing and the Splat Statistics record.

The Check Boxes:

Auto Draw locks out Draw Frame and enables drawing by setting changes.
Auto Fill locks out Draw Filled and enables drawing filled by setting changes.