ライン取り
https://gyazo.com/2f8b08fb1a302a1aa60faf8a47db0682
https://gyazo.com/d1664c5bcfdfdda7b46a7ac1141005bd
https://gyazo.com/877cac963eb2ca1d9f362a8386c6de0bhttps://gyazo.com/9b4d42fd592b08cf13fe083a4a4d4f33https://gyazo.com/6d23fd583aefd7099ba35c950b26e034
https://www.youtube.com/watch?v=SCuRCprzfLs&feature=youtu.be