2繪畫進階圖形

題目一：雪花（6個正六邊形）

http://blockly-demo.appspot.com/static/apps/turtle/index.html#qzga7g

題目二：12個正八邊形

http://blockly-demo.appspot.com/static/apps/turtle/index.html#wotoiy

題目三：12光芒圖形

1.畫12個三角形

http://blockly-demo.appspot.com/static/apps/turtle/index.html#av58qi

2.畫12光芒＋正12邊形

http://blockly-demo.appspot.com/static/apps/turtle/index.html#nitjco

題目四：星星

star(2,50)

start(3.50)

http://blockly-demo.appspot.com/static/apps/turtle/index.html#hvrm6r

題目五

http://blockly-demo.appspot.com/static/apps/turtle/index.html#2y4rzr

http://blockly-demo.appspot.com/static/apps/turtle/index.html#5of2e2