# tk_green_blast.py

# tk_green_blast.py

# Imports
from tkinter import *
import time

ww = 600
hh = 600

root = Tk()
root.title('green blast')
root.geometry(f'{ww}x{hh}+0+0')

canvas = Canvas(root, width=ww, height=hh, bg='black')
canvas.pack()

x = ww//2
y = hh//2
while 1:
    radius = 1.5
    gradient = 255
    while gradient > 0:
        t = time.time() + 0.009
        canvas.delete('all')
        color = f"#00{gradient:02x}00"
        canvas.create_oval(x - radius, y - radius, x + radius, y + radius, fill=color, outline="")
        gradient -= 1
        radius -= 1
        while t > time.time():
            canvas.update()