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.)
オO キKI クKU ケKE ゴGO ズZU ゼZE ソSO ゾZO タTA ツTU トTO バBA
 プPU ヘHE ベBE ポPO ヨYO リRI ヰWI ヱWE ヴVU ヸVI ヹVE ヺVO
  O  KI  KU  KE  GO  ZU  ZE  SO  ZO  TA  TU  TO  BA
PU  HE  BE  PO  YO  RI  WI  WE  VU  VI  VE  VO