"The Zone"

The zone is your working mental buffer. It's what you're currently juggling. At most we can juggle 7 plus or minus 2 things at a time. The Goo tries to make coding easier and quicker by throttling your mental buffer. It does this by keeping you in the productive "zone" while minimising the cost of context switching. It maintains a trail of all the actions you do. The Zone is the 'tail' of this trail.