save project

my_tree.py

-import turtle
+import turtle,random
 
-pen = turtle.Turtle()
-pen.color('sienna')
+t = turtle.Pen()
+t.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()
+se = turtle.Screen()
+se.bgcolor('wheat')      # wheat小麦
 
+# 移动到起点(90)
+t.setheading(90)
+t.up()
+t.backward(150)    # 后退
+t.down()
+t.speed(0)
+def tree(n):
+    if n>=0:
+        if n<=15:
+            c=random.choice(["snow","lightcoral"])
+            t.pencolor(c)
+            t.pensize(5)
+        else:
+            t.pencolor("sienna")
+            t.pensize(n/10)
+        angle=random.randint(1,30)
+        length=random.randint(1,15)
+        t.forward(n)
+        t.right(angle)
+        tree(n-length)
+        t.left(angle*2)
+        tree(n-length)
+        t.right(angle)
+        t.up()
+        t.backward(n)
+        t.down()
+tree(60)
 turtle.done()