save project

my_tree.py

+import turtle
+import random
+
+pen = turtle.Turtle()
+
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+colors=['snow','lightcoral']
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+def tree(n):
+    if n>=0:
+        if n<=12:
+            pen.pensize(n/3)
+            pen.color(random.choice(colors))
+        else:
+            pen.pensize(n/10)
+            pen.color('sienna')
+
+        pen.forward(n)
+        angle = random.randint(0,30)
+        
+        pen.left(angle)
+        chang = random.randint(2,10)
+        tree(n-chang)
+        pen.right(2*angle)
+        tree(n-chang)
+        pen.left(angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+pen.speed(1000)
+tree(60)
+pen.hideturtle()
+turtle.done()