import math
from turtle import *

def heart_x(t):
    return 15 * math.sin(t) ** 3

def heart_y(t):
    return (12 * math.cos(t)
            - 5 * math.cos(2 * t)
            - 2 * math.cos(3 * t)
            - math.cos(4 * t))

speed(0)
bgcolor("black")
color("red")
hideturtle()

for i in range(600):
    t = i * 2 * math.pi / 600
    goto(heart_x(t) * 18, heart_y(t) * 18)
    goto(0, 0)


penup()
goto(0, -280)
color("white")
write("I love you", align="center", font=("Arial", 28, "bold"))

done()