vibrant_circle.py

import turtle
t = turtle.Turtle()
turtle.bgcolor("black")
t.pencolor("green")

a=0 
b=0
t.speed(0)
t.penup()
t.goto(0,200)
t.pendown()
while True:
	t.forward(a)
	t.right(b)
	a = a+3
	b = b+1
	if b == 210:
		break
	t.hideturtle()
turtle.done()