One Command Block of UPGRADE DRAGON!

     .DRAGON+ VERSION: ALPHA 2.0

-Use this command to give a command block:
/give @p command_block

-Then paste this into the command block. It generate a capsule and a signs. Do click in the sign o SUMMON DRAGON to summon it or KILL DRAGON to kill it:

/summon FallingSand ~ ~2 ~ {Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{TileEntityData:{Command:"/fill ~2 ~-1 ~2 ~-2 ~4 ~14 minecraft:stained_glass 13 hollow",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/fill ~2 ~-2 ~2 ~-2 ~-2 ~14 minecraft:stained_hardened_clay 5",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/fill ~1 ~-2 ~3 ~-1 ~4 ~13 air",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/fill ~1 ~-3 ~12 ~-1 ~0 ~12 redstone_block",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"summon FallingSand ~-1 ~3 ~11 {Riding:{Riding:{Riding:{TileEntityData:{Command:\"/gamerule commandBlockOutput false\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/gamerule logAdminCommands false\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/tell @a https://www.youtube.com/user/ExtraYeahMC\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},id:\"FallingSand\",Block:\"iron_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"summon FallingSand ~-1 ~2 ~13 {Riding:{Riding:{Riding:{TileEntityData:{Command:\"/tell @a https://www.youtube.com/c/ESTORIL1YTminer\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/scoreboard objectives add cp_a deathCount\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/scoreboard players set @a cp_a 0\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},id:\"FallingSand\",Block:\"iron_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"summon FallingSand ~0 ~1 ~11 {Riding:{Riding:{TileEntityData:{Command:\"fill ~-2 ~4 ~3 ~2 ~4 ~-9 minecraft:stained_hardened_clay 5\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"summon FallingSand ~0 ~1 ~-8 {id:\\\"FallingSand\\\",Block:\\\"redstone_block\\\",Time:1}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},id:\"FallingSand\",Block:\"iron_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/summon FallingSand ~-1 ~2 ~3 {Riding:{Riding:{TileEntityData:{Command:\"/fill ~1 ~ ~ ~1 ~3 ~7 stone\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @e[type=EnderDragon,rym=-60,ry=-30] ~ ~ ~ /summon FallingSand ~-10 ~1 ~-6 {TileID:51,Motion:[-1.0,0.04,-1.0],Time:1}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @e[type=EnderDragon,rym=30,ry=60] ~ ~ ~ /summon FallingSand ~10 ~1 ~-6 {TileID:51,Motion:[1.0,0.04,-1.0],Time:1}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/summon FallingSand ~1 ~1 ~3 {Riding:{TileEntityData:{Command:\"/fill ~-1 ~ ~ ~-1 ~3 ~7 redstone_block\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @p[score_cp_a_min=1] ~ ~ ~ /kill @e[type=EnderDragon]\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/setblock ~ ~-6 ~1 wall_sign 2 0 {Text1:\"===============\",Text2:\"{text:\\\"Click\\\",color:\\\"dark_red\\\",clickEvent:{action:run_command,value:\\\"/fill ~2 ~2 ~ ~-2 ~-4 ~13 air\\\"},extra:[{text:\\\" to remove\\\",color:\\\"black\\\"}]}\",Text3:\"this structure\",Text4:\"===============\"}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/setblock ~ ~-8 ~1 wall_sign 2 0 {Text2:\"{\\\"color\\\":\\\"dark_red\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/tell @a https://www.youtube.com/c/ESTORIL1YTminer\\\"},\\\"text\\\":\\\"CREDITS\\\"}\",Text3:\"{\\\"color\\\":\\\"dark_red\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/tell @a COMMANDS INSPIRATED IN\\\"},\\\"text\\\":\\\"CLICK\\\"}\",Text1:\"{\\\"color\\\":\\\"dark_blue\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/tell @a ONE COMMAND BLOCK BY\\\"},\\\"text\\\":\\\"\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\"}\",Text4:\"{\\\"color\\\":\\\"dark_blue\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/tell @a https://www.youtube.com/user/ExtraYeahMC\\\"},\\\"text\\\":\\\"\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\"}\",y:4,x:-239,z:-431,id:\"Sign\"}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/setblock ~ ~-10 ~1 wall_sign 2 0 {Text2:\"{\\\"color\\\":\\\"blue\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/scoreboard players set @a cp_a 0\\\"},\\\"text\\\":\\\"SUMMON\\\"}\",Text3:\"{\\\"color\\\":\\\"blue\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/summon EnderDragon\\\"},\\\"text\\\":\\\"ENDER DRAGON\\\"}\",Text1:\"{\\\"color\\\":\\\"dark_blue\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"\\\"},\\\"text\\\":\\\"\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\"}\",Text4:\"{\\\"color\\\":\\\"dark_blue\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"\\\"},\\\"text\\\":\\\"\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\"}\",y:4,x:-238,z:-431,id:\"Sign\"}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/setblock ~ ~-12 ~1 wall_sign 2 0 {Text2:\"{\\\"color\\\":\\\"dark_green\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/scoreboard players set @a cp_a 1\\\"},\\\"text\\\":\\\"KILL\\\"}\",Text3:\"{\\\"color\\\":\\\"dark_green\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/kill @e[type\\\\u003dEnderDragon]\\\"},\\\"text\\\":\\\"ENDER DRAGON\\\"}\",Text1:\"{\\\"color\\\":\\\"dark_blue\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"\\\"},\\\"text\\\":\\\"\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\"}\",Text4:\"{\\\"color\\\":\\\"dark_blue\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"\\\"},\\\"text\\\":\\\"\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\\u003d\\\"}\",y:4,x:-237,z:-431,id:\"Sign\"}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/fill ~ ~-13 ~ ~-1 ~2 ~ air",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/fill ~-1 ~-14 ~ ~-1 ~-1 ~ redstone_block",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},id:"FallingSand",Block:"redstone_block",Time:1}