The general steps are: 1. Dig a watermelon with a spoon, preferably intact, so that you can cover it after eating. 2. Dig watermelon soil with a spoon. You can carve your favorite pattern on the watermelon shell with a meat cleaver, but the spoon I used at that time dug out a shape similar to a pumpkin ghost lamp, so the work of watermelon shell was completed. Put the lighted candle in and cover it.