Laurelian.

 1function aSystemOfCells() {
 2  return function interlinkedWithin() {
 3    return function cells () {
 4      return function cellsInterlinked() {
 5        return function oneStem() {
 6          return function interlinked() {
 7            return function dreadfullyDistinct() {
 8              return function againsThedark() {
 9                return function aTall() {
10                  return function whiteFountain() {
11                    return (function played() {})()
12                  }
13                }
14              }
15            }
16          }
17        }
18      }
19    }
20  }
21}