save project

my_tree.py

+import turtle
+import random
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+pen.left(90)
+pen.up()
+pen.backward(150)
+pen.down()
+# 移动到起点
+def c(n):
+    if n>=50:
+        pen.pensize(n/3)
+        a=random.randint(0,30)
+        b=random.randint(0,15)
+        pen.forward(n)
+        pen.right(a)
+        c(n-b)
+        pen.left(a*2)
+        c(n-b)
+        pen.up()
+        pen.right(a)
+        pen.backward(n)
+        pen.down()
+    if n<=12:
+        pen.color("snow" and "lightcoral")
+        pen.pensize(n/3)
+    else:
+        pen.color(sienna)
+        pen.pensize(n/10)
+c(100)
\ No newline at end of file