How to make a snow cannon in my world, a cannon making tutorial

My world snow cannon can defend against monster attacks, especially melee monsters, which is very convenient for players, but how to make snow cannons? What materials do you need? The following system is a small series to share my world snow cannon Detailed production method for the player's reference. Snow defensive gun introduction Snow scorpion can repel the monster 0.5-1 grid, which is very effective for short-range monsters such as creepers, spiders, zombies, zombie pigs, etc. It is suitable for mid-term production, because creepers are extremely scary in difficult and extreme mode. First, make a pumpkin farm near your home. When you think that there are enough pumpkins, you can make a snow blower. The snow and pumpkin are the materials of the ferrets. Warning: The snow can't touch the water, even the rain! The material defense gun needs: Snow block 1-2 +- pumpkin 1-2 group +- fence 3 group +- wooden gate 1-2 +- wood block or Half-wood block 2-3 groups +- Production method First use a fence to surround your home, there must be space in the fence, and then use the wooden gate to make 1 exit, first use 2 snow blocks and 1 pumpkin to make a ferrets 20 -40: Must be done during sunny daytime, and then use wood as a shelter: it must be done here. Remember: Cover all your property. If your home is large, please prepare 2 times of supplies. Monster problem warning: Although the defensive cannon can repel the enemy, but does not cause damage, you can set a deep hole behind the defensive gun, it is best to hit the dead, you can also do the falling object collector can also be an iron giant: enough material More attention can be paid: Set a back door so that the monster is not completely killed when going out