theres a section about this in babyology (btw):
https://hell.twtr.plus/media/953db751cf7434c1db5ce24ce7d97dc53fb1269c9550c39f0ecd053e4fb167a4.file
https://hell.twtr.plus/media/2efb472c4b0e18c09edbbf1e1a48dff2eb39e07b381739b2039a8a2c1712e7db.file
https://hell.twtr.plus/media/425fac06f1608e4345e71ff9c988a2d3a0108e0d54b6aedec599a71db66621c8.file
https://hell.twtr.plus/media/3f6019287897cd5a90d853aec42b396cc132b9743c596125db44ce6cff959ff4.file