How does my world capture animals with Redstone commands

Many players are not very familiar with how to use Redstone to capture animals in "My World", and the following system is a series of tips and tricks for you to share with you. I hope everyone likes it.
Players can use the combination of Redstone and Command Blocks to achieve more features. Recently, players have used Redstone commands to capture animals. This is the size of the entire organization. The first command block of an intermediate frequency /testfor @e[type=Arrow,c=1] {inGround:1b}detects the second command block of the arrow /execute @e[type=Arrow,c=1] ~ ~ ~ clone 69 87 126 65 89 130 ~ ~ ~ Execute the clone command at the arrow. The two coordinates contain the range of the glass wall. (Do not do the glass wall yourself, do it after the coordinates change) /kill @e[type=Arrow].