Most of my designs have an underlying grid. The grid is drawn on the unglazed tile with pencil, before I apply glazes. Sometimes I use multiple firings, to first apply one colour and then apply another as this gives a different effect then applying all the glazes in one go.
The combination of using a grid and applying the glazes by hand gives the pattern its liveliness.
The design of the pattern comes from sketching but also from combinations of glazes which I test and then give me inspiration for patterns.