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一

import turtle as t
color = ['red','green','blue','orange','pink']
for i in range(len(color)):t.penup()t.goto(-200+70*i,0)t.pendown()t.pencolor(color[i])t.circle(50, steps = 5)
t.done()

二

#在____________上补充代码
#不要修改其他代码import random as r
import turtle as t
def drawSnake(angl):t.penup()t.goto(0,200)t.pendown()t.seth(-1*angl)for i in range(length):t.circle(radius, angl)t.circle(-radius, angl)length, radius = 3, 40
r.seed(1)
color = ['red','blue','purple','black']
for i in range(len(color)):t.pencolor(r. choice (color))angl = r. randint (30, 180)drawSnake(angl)
t.done()

三

import turtle as t
for i in range(4):t.fd(200)t.left(90)
t.penup()
t.goto(100,0)
t.pendown()
t.pencolor('green'，'red')
t.pensize(5)
t.begin_fill()
t.circle(100) 
t.end_fill()
t.done()

四

import turtle as t
import random as r
color = ['red','blue','purple','black']
r.seed(1)
for j in range(4):t.pencolor(r.choice(color))t.penup()t.goto(r.randint(-100,100), r.randint(-100,100))t.pendown()ra = r.randint(50, 200)for i in range(1,5):t.fd(ra)t.seth(90*i)
t.done()

五

import turtle as t
import random as rcolor = ['red','green','blue','purple','black']
r.seed(1)
for j in range(5):t.pencolor(color[r.randint(0,6)])t.penup()t.goto(r.randint(-100,100),r.randint(-100,100))t.pendown()t.circle(r.randint(10,30))

六

import turtle
n = 4
for j in range(n):turtle.pendown()for i in range(4):turtle.fd(40)turtle.right(90)turtle.penup()turtle.fd(80)
turtle.done()

七

import turtle as t
color = ['red','green','blue']
rs = [10,30,60]for i in range(3):t.penup()t.goto(0, -rs[i])t. pendown()t.pencolor(color[i])t.circle(rs[i])
t.done()

八

import turtle as t
import random as rr.seed(1)
t.pensize(2)
for i in range(3):length = r.randint(20, 80)x0 = r.randint(-100, 100)y0 = r.randint(-100, 100)t.penup()t.goto(x0, y0)t.pendown()for j in range(4):t.forward(length)t.setheading(90 * (j + 1))
t.done()

九

import turtle as t
import random as r
color = ['red','orange','blue','green','purple']
r.seed(1)
for i in range(5):rad = r.randint(20,50)x0 = r.randint(-100,100)y0 = r.randint(-100,100)t.color(r.choice(color))t.penup()t.goto(x0,y0)t.pendown()t.circle(rad)
t.done()