You need four pieces, two of each pattern. Use four different colours. Before you start weaving join two different pieces of different colour. When joining fold out the heart pieces and place them flat, one over the other so that they form a complete piece. Then join one blade face at a time using the two types of cut. Weaving is quite simple, but consider that the colour of the lowest part of the blade must be different from the colour it meets at the strips. See how the colours in the picture are distributed.