1. Prepare brushes and pigments. You can use the brushes and pigments in the game, or you can use external software such as Photoshop or GIMP.
2. Choose the right color. Lemons are generally yellow, so you can choose yellow as the main color. If you want the lemon to look more real, you can add some orange and green to the yellow.
3. Draw a lemon shape. Lemons are usually oval. You can draw an oval with a brush.
4. Add details. You can add some textures to lemons, such as bright spots or dark lines. You can also add some shadows and highlights to make the lemon look more solid.
5. Save your work. When finished, you can save your work to the game or external software.