save project

my_tree.py

+import turtle
+import random
+def tree(n):
+    if n>=5:
+        jd=random.randint(0,30)
+        chd=random.randint(0,15)
+        c=random.randint(1,2)
+        cd=random.randint(3,7)
+        if n>=12:
+            pen.pensize(n/10)
+            pen.color('sienna')
+            pen.down()
+            pen.forward(n)
+            pen.right(jd)
+            tree(n-chd)
+            pen.left(jd*2)
+            tree(n-chd)
+            pen.right(jd)
+            pen.up()
+            pen.backward(n)
+        else:
+            
+            pen.pensize(n/3)
+            if c==1:
+                pen.pencolor("snow")
+                pen.forward(cd)
+                pen.backward(cd)
+            else:
+                pen.pencolor("red")
+                pen.forward(cd)
+                pen.backward(cd)
+        
+
+pen = turtle.Turtle()
+
+# 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()
+
+tree(60)
+turtle.done()
+