I keep coming back to how cool spirographs are and were when I was a kid for today's dailysketch. graph
每日草圖13：螺旋形
2015、curves、d13、daily、dailyclipart、dailysketch、dailysketch 13、Daily Sketch Announcement、draw、epitrochoid、filter mapitize、fun、game、hipotrochoid、openclipart、parametric、request complete、request dailysketch、sketch、spiro、spirograph、trochoid、upload2openclipart、vectorized
2015、曲線、D13、日常、dailyclipart、dailysketch、dailysketch 13、每日草圖公告、畫、外旋輪線、過濾審查、開玩笑、遊戲、hipotrochoid、開放美工圖庫、參數、請求完成、請求dailysketch、草圖、螺、萬花尺、擺線、upload2openclipart、矢量
資料來源：openclipart ( https://openclipart.org/ )