Merge pull request #9 from FumihikoKouno/master

add Env.java and change initial position
add countdown
Merge pull request #10 from bluedragon1/master

add countdown
add function to matching firsta position
Merge pull request #11 from bluedragon1/master

add function to matching firsta position
add change countdown parameter
Merge pull request #12 from bluedragon1/master

add change countdown parameter
Merge https://github.com/t-korin/ProjectStudy