I just found something amazing. Use the latest snapshot, create a new single-player world, take a command block and put this command in it: Spoiler: Command summon FallingSand ~ ~3 ~ { Block:redstone_block ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: "fill ~-1 ~1 ~-1 ~1 ~-13 ~1 air "} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:redstone_block ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: "scoreboard objectives add timer dummy"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:redstone_block ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: "scoreboard objectives add leaves dummy"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:redstone_block ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: "summon FallingSand ~4 ~-2 ~ { Block:stained_glass,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_1] ~ ~ ~ summon Bat ~ ~0.5 ~ {CustomName:Tree1_2,ActiveEffects:[{Id:20,Duration:1000000,ShowParticles:false,Amplifier:5}],HealF:3} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:stained_glass,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:stained_glass,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_0,score_timer_min=1,score_timer=5] ~ ~ ~ summon Bat ~1 ~ ~-1 {CustomName:Tree1_5,ActiveEffects:[{Id:20,Duration:1000000,ShowParticles:false,Amplifier:5}],HealF:3} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_0,score_timer_min=1,score_timer=5] ~ ~ ~ summon Bat ~1 ~ 1~ {CustomName:Tree1_5,ActiveEffects:[{Id:20,Duration:1000000,ShowParticles:false,Amplifier:5}],HealF:3} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_0,score_timer_min=20] ~-.5 ~-.6 ~-.5 setblock ~ ~ ~ log 0 \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_0,score_timer=20] ~-.5 ~-.6 ~-.5 fill ~ ~ ~ ~1 ~1 ~1 log 0 replace air \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" tp @e[type=Bat,name=Tree1_3] ~ ~-0.1 ~ \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" tp @e[type=Bat,name=Tree1_0] ~ ~0.6 ~ \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" kill @e[type=Squid,name=Tree1] \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_4] ~-0.5 ~ ~-0.5 fill ~ ~ ~ ~1 ~1 ~1 air 2 replace air 0 \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Squid,name=Tree1] ~ ~ ~ summon Bat ~ ~ ~-1 {CustomName:Tree1_0,ActiveEffects:[{Id:20,Duration:1000000,ShowParticles:false,Amplifier:5}],HealF:4} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Squid,name=Tree1] ~ ~ ~ summon Bat ~-1 ~ ~ {CustomName:Tree1_0,ActiveEffects:[{Id:20,Duration:1000000,ShowParticles:false,Amplifier:5}],HealF:4} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Squid,name=Tree1] ~ ~ ~ summon Bat ~ ~ ~1 {CustomName:Tree1_0,ActiveEffects:[{Id:20,Duration:1000000,ShowParticles:false,Amplifier:5}],HealF:4} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Squid,name=Tree1] ~ ~ ~ summon Bat ~1 ~ ~ {CustomName:Tree1_0,ActiveEffects:[{Id:20,Duration:1000000,ShowParticles:false,Amplifier:5}],HealF:4} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" fill ~-1 ~ ~ ~-1 ~12 ~ redstone_block \"} ,Time:1,DropItem:0 }}}}}}}}}}}}}}}}} " } ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:redstone_block ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: "summon FallingSand ~3 ~ ~ { Block:redstone_block ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" fill ~ ~1 ~ ~ ~-4 ~ air \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:redstone_block ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" give @a spawn_egg 1 94 {display:{Name: \\"Tree1\\"}} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:redstone_block ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" fill ~ ~-2 ~ ~ ~-17 ~ redstone_block 0 replace wool 15 \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block ,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_1] ~ ~ ~ summon Bat ~ ~0.5 ~ {CustomName:Tree1_4,ActiveEffects:[{Id:20,Duration:1000000,ShowParticles:false,Amplifier:5}],HealF:2} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" summon FallingSand ~ ~1.1 ~ {TileID:152,Motion:[0.0,0.1,0.0]} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_5] ~ ~.5 ~ setblock ~ ~ ~ log 12 \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:wool,Data:15 ,Time:1,DropItem:0 }}}}}}}}}}}}}}}}}}}}}}} " } ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:redstone_block ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: "summon FallingSand ~2 ~2 ~ { Block:stained_glass,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_1] ~ ~ ~ summon Bat ~ ~0.5 ~ {CustomName:Tree1_3,ActiveEffects:[{Id:20,Duration:1000000,ShowParticles:false,Amplifier:5}],HealF:2} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:stained_glass,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:stained_glass,Data:15 ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_0,score_timer_min=1,score_timer=5] ~ ~ ~ summon Bat ~-1 ~ ~-1 {CustomName:Tree1_5,ActiveEffects:[{Id:20,Duration:1000000,ShowParticles:false,Amplifier:5}],HealF:3} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_0,score_timer_min=1,score_timer=5] ~ ~ ~ summon Bat ~-1 ~ ~1 {CustomName:Tree1_5,ActiveEffects:[{Id:20,Duration:1000000,ShowParticles:false,Amplifier:5}],HealF:3} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_1,score_leaves_min=1] ~ ~ ~ fill ~-6 ~-6 ~-6 ~6 ~6 ~6 leaves 0 replace air 2 \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_3] ~-0.5 ~-1.5 ~-0.5 fill ~ ~ ~ ~1 ~1 ~1 air 2 replace air 0 \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" tp @e[type=Bat,name=Tree1_1] ~ ~0.3 ~ \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_2] ~ ~ ~ fill ~-1 ~-1 ~-1 ~1 ~1 ~1 air 2 replace air 0 \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_1] ~ ~-.5 ~ setblock ~ ~ ~ log 12 replace air \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" tp @e[type=Bat,name=Tree1_4] ~ ~0.1 ~ \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" tp @e[type=Bat,name=Tree1_5] ~ ~-0.3 ~ \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" execute @e[type=Bat,name=Tree1_0,score_timer_min=15,score_timer=17] ~ ~ ~ summon Bat ~ ~2 ~ {CustomName:Tree1_1,ActiveEffects:[{Id:20,Duration:1000000,ShowParticles:false,Amplifier:5}],HealF:5,AbsorptionAmount:1} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" scoreboard players set @e[type=Bat,name=Tree1_1] leaves 1 {Health:1s} \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" scoreboard players add @e[type=Bat] timer 1 \"} ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: \" fill ~1 ~ ~ ~1 ~12 ~ wool 15 \"} ,Time:1,DropItem:0 }}}}}}}}}}}}}}}}} " } ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:redstone_block ,Time:1,DropItem:0,Riding:{id:FallingSand, Block:command_block,TileEntityData:{Command: "fill ~2 ~-1 ~ ~4 ~-1 ~ stained_glass 15 "} ,Time:1,DropItem:0 }}}}}}}}}}}}}} You're gonna love it. (By the way, this is made by JL2579)
Players are getting smarter everyday.. Ha.. Man, I got to read that Command Block Instructions Book XD.
No I meant like, you can put the command block underground and then put a pressure plate above, and whoever steps on it dies because of the sand suffocating xD