save project

my_tree.py

 import turtle
 import turtle
-
+import random
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
 # 画布大小
 # 画布大小
 w = turtle.Screen()
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 w.bgcolor('wheat')      # wheat小麦
-
+pen.pensize(10)
 # 移动到起点
 # 移动到起点
 pen.left(90)
 pen.left(90)
-pen.forward(150)
-pen.right(30)
-pen.forward(90)
-pen.backward(90)
-pen.left(60)
-pen.forward(90)
-pen.right(30)
-
+pen.backward(100)
+def hsz(n): 
+    if n>=50:
+        if n<=10:
+            cplor_list=['snow','lightcoral']
+            cplor=random.choice(cplor_list)
+            pen.color(color)
+            pen.pensize(50)
+        else:
+            pen.color('sienna')
+            pen.pensize(n/10)
+        pen.pensize(n/10)
+        pen.forward(n)
+        angle=random.randint(0,40)
+        long=random.randint(0,10)
+        pen.right(angle)
+        hsz(n-long)
+        pen.left(angle*2)
+        hsz(n-long)
+        pen.right(angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+        #画左树杈
+hsz(100)
 pen.up()
 pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()