Help is in the project. It is based off of my much older project 'command sampler'. This time, the arguments are in the command itself! The code that combines strings and numbers is from my older project 'calc not done'. It even supports negative values for the number arguments where they are appropriate. (The Scratch Cat can't go to (0,0) in -5 seconds!) It will catch incorrectly spelled commands. Download to see how it works.
