Who can help?every time only two yaks are successfully encircled，and I can’t pass this level

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# You are on your own this time, I hope you have learned what you need from the previous fractal levels. Check the guide for help with what you need to do and with the math required for polygons.
# You need a function to convert degrees to radians. Multiply degrees by Math.PI / 180.
def degreesToRadians(angle):
return Math.PI / 180 * angle
# Your polygon function should have 3 inputs: start, end, and sides.
def line(start,end,n,k):
side = Vector.subtract(end,start)
distance = side.magnitude()
if distance < k / n + 1:
hero.toggleFlowers(False)
hero.moveXY(start.x, start.y)
hero.toggleFlowers(True)
hero.moveXY(end.x, end.y)
return
fenxing = Vector.divide(side, n)
for i in range(n):
rotate = Vector.rotate(fenxing, degreesToRadians(360 * i / n))
A = Vector.add(rotate,start)
line(start,A,n,k)
start = A
# Remember to make your polygon recursive, drawing extra polygons at every corner.
# To get the start and end position for each polygon, add startOffset and endOffset to the yak's position.
def flake(a,b,n):
side = Vector.subtract(b,a)
k = side.magnitude()
for i in range(n):
line(a,b,n,k)
hero.toggleFlowers(True)
hero.moveXY(b.x, b.y)
side = Vector.rotate(side,degreesToRadians(360 / n))
a = b
b = Vector.add(b,side)
startOffset = Vector(-15, -15)
endOffset = Vector(15, -15)
# You need to loop through all the yaks, drawing a polygon for each. Yaks are enemies.
enemies = hero.findEnemies()
for enemy in enemies:
sides = enemy.sides
vecEnemy = Vector(enemy.pos.x,enemy.pos.y)
start = Vector.add(vecEnemy,startOffset)
end = Vector.add(vecEnemy,endOffset)
flake(start,end,sides)
```