import math
from pixel import Pixel

def main(pixel: Pixel, resolution: tuple, frag_coord: tuple, time: float): # https://www.shadertoy.com/view/ldX3zr
	invAr = resolution[1] / resolution[0]

	uv = (frag_coord[0] / resolution[0], frag_coord[1] / resolution[1])

	col = [*uv, 0.5 + 0.5 * math.sin(time)]

	x = 0.5 - uv[0]
	y = (0.5 - uv[1]) * invAr

	r = -(x * x + y * y)
	z = 1.0 + 0.5 * math.sin((r + time * 0.035) / 0.013)

	for i in range(3):
		col[i] *= z

	pixel.background_color.set( *col )