Easy DIY Tutorial natural freshwater necklace 46cm no knot between pearls, four layers string

As it is not so easy to make knots between pearls, sometimes, we can make necklaces without knots between pearls, but thread 4 layes strings and with mini size pearls between the bigger size pearls. The necklace looks nice,too. And no worries, there are 4 layers strings, the necklace is strong.
The pearls are natural freshwater pearl and they are all natural purple color.
The bigger baroque freshwater pearl size:9.5-10x11-12mm
The mini purple freshwater pearl size: 4mm