Be sure to know the specifications before drawing , I found a rough picture .
Refer to the picture ：
The way to draw a big star is very simple , The complement of the pentagram is 144 degree .
It's a bit of a hassle to draw a pentagram , Because the small five pointed star on our national flag is not flat （ The United States once missed our flag like this ）, But there is always an angle facing the center of the big five pointed star ！ My approach is , Locate the center of the little Pentagram , And then back a certain length according to the angle . This angle can be calculated from the anti Pythagorean theorem （ There are Calculation tools ）, I divide the length by the distance from the center of the big Pentagram to the tip of the corner 3 Got .
from turtle import * screensize(2000,2000,'white')# Set canvas size # Draw flag face pencolor('red') pu() goto(-300,-200) pd() fillcolor('red') begin_fill() for i in range(0,2): fd(600) lt(90) fd(400) lt(90) end_fill() # Draw the big five pointed star pu() pencolor('yellow') goto(-260,120) pd() fillcolor('yellow') begin_fill() for i in range(0,5): fd(120) rt(144) end_fill() # Draw four little pentagrams list1 = [(-100,160),(-60,120),(-60,60),(-100,20)]# The central coordinates of the four pentagonal stars list2 = [31.98,8.13,-15.59,-38.66]# Relative angle 0 The retreat of 1.111 You need to turn left for j in range(0,4): seth(0)# This is the glans. The angle is 0 pu() goto(list1[j])# Locate the center of the pentagram lt(list2[j])# Rotation Angle , Pointing back to the tip of the big Pentagram bk(1.111)# From the center of the pentagram to the point of the big five pointed star （ The tortoise crawled backwards ） lt(18)# Half angle of Pentagram pd() fillcolor('yellow') begin_fill() for i in range(0, 5): fd(40) rt(144) end_fill() pu()# Raise your glans ht()# Hide the glans done()# keep
design sketch ：