save project

a.py

+import turtle
+import random
+
+pen = turtle.Turtle()
+pen.color('sienna')
+pen.speed(99)
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+# # 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)
+pen.down()
+
+# 树枝
+def tree(n):
+    if n >= 0:
+        if n <= 12:
+            color_list = ['snow', 'lightcoral']
+            color = random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n / 3)
+        else:
+            pen.color('sienna')  # 赭(zhě)色
+            pen.pensize(n / 10)  
+        pen.forward(n)
+        angle = random.random()
+        pen.right(30*angle)
+        length = 1.5*random.random()
+        tree(n-10*length)
+        pen.left(60*angle)
+        tree(n-10*length)
+        pen.right(30*angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+
+tree(60)
+turtle.done() 

my_tree.py

+import turtle,random
+from random import randint
+
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+
+def a(n):
+    if n>=0:
+        if n<=12:
+            color_list=['snow','lightcoral']
+            pen.pencolor(random.choice(color_list))
+            pen.pensize(n/3)
+        else:
+            pen.color('sienna')
+            pen.pensize(n/10)
+        b=randint(0,30)
+        c=randint(0,15)
+        # pen.pensize(n/10)
+        pen.forward(n)
+        pen.right(b)
+        a(n-c)
+        pen.left(b*2)   
+        a(n-c)
+        pen.right(b)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+
+pen.speed(100)
+a(60)
+
+turtle.done()
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