save project

my_tree.py

 import turtle
 import turtle
+import random
+
+def tree(n):
+    if n>=0:
+        if n<=12:
+            asx=['snow','lightcoral']
+            pen.pencolor(random.choice(asx))
+            pen.pensize(n/3)
+        else:
+            pen.color('sienna')
+            pen.pensize(n/10)
+        
+        pen.forward(n) 
+        s=random.randint(0,30)
+        k=random.randint(1,15)
+        pen.right(s)
+        tree(n-k)
+        pen.left(s*2)
+        tree(n-k)
+        pen.right(s)
+        pen.up()    
+        pen.backward(n)
+        pen.down()
         
         
 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.speed(0)
 # 移动到起点
 # 移动到起点
 pen.left(90)
 pen.left(90)
 pen.up()
 pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
 
 
+tree(60)
+# pen.forward(100)
+# pen.left(30)
+# pen.forward(50)
+# pen.up()
+# pen.backward(50)
+# pen.down()
+
+# pen.right(60)
+
+# pen.forward(50) 
+# pen.up()    
+# pen.backward(50)
+# pen.down()
+# pen.left(30) 
+
+# pen.up()
+# pen.backward(100)
+# pen.down()
+
 turtle.done()
 turtle.done()
+turtle.hideturtle()