Click Japanese Katakana in sequence. If you missed a symbol, then blink would stop responding.
(Know or already memorized symbols? Then try the phonetic order.)
ガGA クKU グGU ケKE コKO ゴGO スSU タTA チTI ヂDI ヅDU テTE バBA
 ビBI ピPI フHU プPU ベBE ホHO ポPO マMA ミMI モMO ヤYA ヨYO
  GA  KU  GU  KE  KO  GO  SU  TA  TI  DI  DU  TE  BA
BI  PI  HU  PU  BE  HO  PO  MA  MI  MO  YA  YO