The lion needs the squirrel. The squirrel chases the lion. The squirrel visits the lion. If the squirrel chases the lion and the lion is rough then the squirrel needs the lion. If the lion does not visit the squirrel and the squirrel does not visit the lion then the squirrel is green. If someone does not need the lion then they are not rough.
The squirrel does not visit the lion.