Step 1; Simply roll out some clay and start cutting, rather than drawing out the pattern you wish to see in tile on your wall.
Trim crumbly bits off.
Step 2: Select colors and paint 3 layers of underglaze on each piece.
Be careful not to mix up pieces, not to forget to do 3 layers on each piece and to be sure that it is the same 3 colors on each piece;
step 4; Transfer all those pieces to the kiln and do a bisque firing.
Step 5; Remove from kiln and put 3 coats of gloss glaze on each tiles. The concerns are the same as in step 2, also be careful not to get gloss glaze on the backs of the tiles. They may stick to the kiln shelf if you do.
Step 6; Transfer mosaic tiles to installation location and glue in place.
Step 7; Grout mosaic.
Now wasn't that easy!