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You can conveniently draw many figures you want by utilizing Diagram Dotstick.
Also, you can check number on the every color paper.
You can fill in the holes from dotstick to draw figures conviniently when you want to draw lines with gaps or to draw polygons and an arc.
Ansan, South Korea
Ansan City, Gyeonggi-Do, South Korea
Han-kak Lee, Sung-mi Kang, Yeon-hwan Sung