Knowledges, before learn logics

there is pull power & push power of info

certification 1

1⃣ wave pulls surfer

  1 if wave frequency, faster than surfer, wave push surfer
  2 if wave frequency, slower than surfer, wave pull surfer
  3 at usual, wave become slow, when wave spreads. 
    = ( https://en.wikipedia.org/wiki/Redshift )

2⃣ info save system & wave

  1 when energy flows in save system, that is active, 
  2 when we check info, we use light energy
  3 energy in save system 
    = vibration of save system
    = save system, send particular wave

1⃣ & 2⃣ = info save system, send wave = info save system, pulls Surfer & push surfer