Cake yarn is used for his project. The pattern used for the squares is called „Bavarian“ and you can find a pretty good free videos and charts on web.
Beige yarn of the same weight is used for connecting the squares. I have already published a baby blanket with the same pattern. You can find it under my post Julinka

Material: 100% acrylic, 100 g cca 360 m (200 g Berenika from Vlnika, 50 g beige yarn), 4 mm hook
Dimensions: 90 x 90 cm
Skill level: intermediate