language ESSENCE' 1.0
letting initGrid be [
[2, 2, 1, 1], 
[2, 1, 1, 1], 
[2, 1, 2, 2], 
[2, 1, 2, 1], 
[2, 2, 1, 2]
]
letting goalBlocksRemaining be 3
letting noSteps be 16