Needle (wool can be inserted), all kinds of wool, plastic insole, scissors.
Methods/steps
First, prepare the required wool according to the pattern color on the matching card in the insole.
Then according to the pattern, embroider the wool with the leftmost color from left to right, and insert the wool with this color into the needle (don't tie it, just knit it with a single thread).
Then count the squares according to the proportion of the patterns on the insole. Put the knitting needle on the back of the insole, insert it into the front of the insole from the upper left corner of the cross, and then go out from the lower right corner of the cross (return to the back of the insole at this time), and then repeat the above actions until lines of another color appear on the pattern.
Then the needle goes up from the first vertical grid and down from the lower left of the cross grid. Until the first stitch becomes a cross.
Repeat the above operation when changing other colors.
If this embroidery continues, the beautiful insole will be finished.