Python程序優化

題目：Python 程序 test.py 的功能是用海龜庫畫圖，但是代碼比較冗長。請你改進該程序，盡量減少代碼行數，但程序功能需要跟改進前保持一致。
請提交改進後的 Python 程序文件。
import turtle as t
t.speed(0)
a = ["red","yellow","blue","green"]
b = 133
c = (b2+b2)**0.5/2

t.up()
t.left(180)
t.forward(199)
t.right(90)
t.forward(199)
t.right(90)
t.down()

for i in range (4):
t.color(a[i])
t.begin_fill()
t.forward(b)
t.right(135)
t.forward(c)
t.right(90)
t.forward(c)
t.end_fill()
t.right(135)
t.forward(b)
t.right(90)

t.up()
t.right(90)
t.forward(b)
t.left(90)
t.down()

for i in range (4):
t.color(a[i])
t.begin_fill()
t.forward(b)
t.right(135)
t.forward(c)
t.right(90)
t.forward(c)
t.end_fill()
t.right(135)
t.forward(b)
t.right(90)

t.up()
t.right(90)
t.forward(b)
t.left(90)
t.down()

for i in range (4):
t.color(a[i])
t.begin_fill()
t.forward(b)
t.right(135)
t.forward(c)
t.right(90)
t.forward(c)
t.end_fill()
t.right(135)
t.forward(b)
t.right(90)

a = ["yellow","blue","green","red",]
b = 133
c = (b2+b2)**0.5/2

t.up()
t.left(90)
t.forward(2*b)
t.right(90)
t.forward(b)
t.down()

for i in range (4):
t.color(a[i])
t.begin_fill()
t.forward(b)
t.right(135)
t.forward(c)
t.right(90)
t.forward(c)
t.end_fill()
t.right(135)
t.forward(b)
t.right(90)

t.up()
t.right(90)
t.forward(b)
t.left(90)
t.down()

for i in range (4):
t.color(a[i])
t.begin_fill()
t.forward(b)
t.right(135)
t.forward(c)
t.right(90)
t.forward(c)
t.end_fill()
t.right(135)
t.forward(b)
t.right(90)

t.up()
t.right(90)
t.forward(b)
t.left(90)
t.down()

for i in range (4):
t.color(a[i])
t.begin_fill()
t.forward(b)
t.right(135)
t.forward(c)
t.right(90)
t.forward(c)
t.end_fill()
t.right(135)
t.forward(b)
t.right(90)

a = ["blue","green","red","yellow",]
b = 133
c = (b2+b2)**0.5/2

t.up()
t.left(90)
t.forward(2*b)
t.right(90)
t.forward(b)

for i in range (4):
t.color(a[i])
t.begin_fill()
t.forward(b)
t.right(135)
t.forward(c)
t.right(90)
t.forward(c)
t.end_fill()
t.right(135)
t.forward(b)
t.right(90)

t.up()
t.right(90)
t.forward(b)
t.left(90)
t.down()

for i in range (4):
t.color(a[i])
t.begin_fill()
t.forward(b)
t.right(135)
t.forward(c)
t.right(90)
t.forward(c)
t.end_fill()
t.right(135)
t.forward(b)
t.right(90)

t.up()
t.right(90)
t.forward(b)
t.left(90)
t.down()

for i in range (4):
t.color(a[i])
t.begin_fill()
t.forward(b)
t.right(135)
t.forward(c)
t.right(90)
t.forward(c)
t.end_fill()
t.right(135)
t.forward(b)
t.right(90)

t.hideturtle()
t.done()