Ello! I have been really into making command block creations lately and I just created a pretty simple but fun thing. It's called the Rainbow Trail. To make it work just put the command in a command block (/give [Your name] minecraft:command_block) and run it using a button. The command has 4355 characters and it took me a while to make. I would greatly appreciate it if you have me some feedback and try it yourself. I will release one of these maybe a couple times a month. If you have any suggestions for me to do feel free to tell me! Video showcasing it: Command (note: there are some faces in the command but if you copy the whole thing it will be all good ): /summon FallingSand ~ ~1 ~ {Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~ ~ ~1 ~ ~-25 ~1 redstone_block},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~ ~2 ~ ~ ~-26 ~1 air},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~3 ~-12 ~ {Block:command_block,Time:1,TileEntityData:{Command:fill ~ ~ ~-1 ~6 ~ ~1 quartz_block}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command: /say by xXxSnowWolfxXx (Youtube: xXxSnowWolfxXx)},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command: /say Rainbow Trail},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~4 ~-15 ~-1 {Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @p ~ ~ ~ /particle reddust ~ ~0.1 ~ 0.2 0 0.2 10.001 100},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~5 ~-14 ~-1 {Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:\n},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~6 ~-13 ~-1 {Block:quartz_block,Time:1,}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~7 ~-12 ~-1 {Block:quartz_block,Time:1,}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~8 ~-11 ~-1 {Block:quartz_block,Time:1,}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~9 ~-10 ~-1 {Block:quartz_block,Time:1,}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~4 ~-10 ~1 {Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:\n},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~5 ~-9 ~1 {Block:quartz_block,Time:1,}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~6 ~-8 ~1 {Block:quartz_block,Time:1,}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~7 ~-7 ~1 {Block:quartz_block,Time:1,}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~8 ~-6 ~1 {Block:quartz_block,Time:1,}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~9 ~-5 ~1 {Block:quartz_block,Time:1,}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:gamerule commandBlockOutput false},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~3 ~-6 ~ ~9 ~-6 ~ redstone_block},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:setblock ~3 ~-5 ~-1 command_block 0 replace {Command:fill ~ ~ ~1 ~6 ~0 ~1 stone 0 replace redstone_block}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:setblock ~3 ~-4 ~1 command_block 0 replace {Command:fill ~ ~ ~-1 ~6 ~0 ~-1 redstone_block 0 replace stone}},Time:1,Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:setblock ~1 ~-2 ~ wall_sign 4 replace {Text1:"{text:'Rainbow Trail!',bold:true,underlined:true,color:yellow}",Text2:"{text:'Have fun!',bold:true,color:red}",Text3:"{text:'Made by:',bold:true,color:green}",Text4:"{text:'xXxSnowWolfxXx',color:dark_green}"}},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:setblock ~1 ~-2 ~ wall_sign 4 replace {Text1:"{text:'Right click',clickEvent:{action:run_command,value:\\"/fill ~ ~-1 ~-2 ~9 ~2 ~2 air 0 replace\\"},bold:true,color:yellow}",Text2:"{text:'to',bold:true,color:white}",Text3:"{text:'DESTROY',bold:true,underlined:true,color:dark_red}",Text4:"{text:'Machine ',bold:true,color:gray}"}},Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~2 ~-1 ~-2 ~10 ~-1 ~2 stained_glass 0 replace quartz_block},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~3 ~ ~-1 ~9 ~3 ~1 air 0 replace quartz_block},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~2 ~ ~-2 ~10 ~2 ~2 quartz_block},Time:1,Riding:{id:FallingSand,Block:stone,Time:1}}}}}}}}}}}}}}}}}}}}}}}}}}}}