Fibonacci

0 — 23.6 — 38.6 — 50 — 61.8 — 78.6 — 100 — 127.2 — 161.8
200 — 227.2 — 261.8 — 361.8 — 423.6

Main internal ( 23.6 38.6 50 61.8 78.6 )

Main external ( 127.2 161.8 200 261.8 361.8 423.6) , sometimes 227.2