https://twitter.com/nst021/status/1570047611989540865

circles.py

#!/usr/bin/env python3

# https://twitter.com/nst021/status/1570047611989540865
# https://seriot.ch/visualization/circles.png

import cairo
import math

N = 10
STEP = 20
MARGIN = 70
W = MARGIN*2 + 2*(N-1)*STEP
H = W

surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, W, H)
c = cairo.Context(surface)

c.set_source_rgb(0,0,0)
c.paint()

c.set_source_rgb(0.3,0.3,1)
c.set_line_width(3)

m1 = cairo.Matrix(x0=MARGIN)
m2 = cairo.Matrix(xx=-1, x0=W-MARGIN, yy=-1, y0=H)

for m in [m1, m2]:
    
    c.save()
    c.transform(m)

    for n in range(N):
        c.arc(STEP*n, H/2, STEP*(n+1), math.pi, 0)
        c.stroke()
    
    c.restore()

surface.write_to_png("circles.png")