Hello my friends!Today, I have a new command.Spider Man!Follow these steps:1.Make a clock (If you don't know how to make one go to:
https://www.google.co.uk/search?q=minecraft+redstone+clocks&biw=1129&bih=635&tbm=isch&am...
2.Do /give @p command_block
3.Place the command block and connect the redstone to it
4.Type in the command block /execute @e[type=Snowball,] ~ ~ ~ setblock ~ ~ ~ web
5.Then activate the clock
6.Finally, get a snowball and throw it (IMPORTANT:Do /gamerule commandblockOutput false)