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.)
アA オO ガGA ゴGO ジZI ゼZE ソSO ゾZO タTA ヂDI ヅDU ドDO ニNI
 ピPI ミMI ムMU モMO ヤYA リRI ルRU ロRO ヰWI ヱWE ヲWO ヺVO
  A  O  GA  GO  ZI  ZE  SO  ZO  TA  DI  DU  DO  NI
PI  MI  MU  MO  YA  RI  RU  RO  WI  WE  WO  VO