Minecraft 3 Block Trampoline with Only One Command

summon falling_block ~ ~1 ~ {Block:stone,Time:1,Passengers:[{id:falling_block,Block:redstone_block,Time:1,Passengers:[{id:falling_block,Block:activator_rail,Time:1,Passengers:[{id:commandblock_minecart,Command:"gamerule commandBlockOutput false"},{id:commandblock_minecart,Command:"fill ~2 ~-3 ~-1 ~5 ~-1 ~1 stained_hardened_clay 5 hollow"},{id:commandblock_minecart,Command:"fill ~2 ~-2 ~-1 ~5 ~-2 ~1 stained_glass 0 0 stained_hardened_clay"},{id:commandblock_minecart,Command:"setblock ~1 ~-3 ~ wall_sign 4 0 {Text1:\"{\\\"text\\\":\\\"============\\\"}\",Text2:\"{\\\"text\\\":\\\"Click to remove\\\"}\",Text3:\"{\\\"text\\\":\\\"this OOC \\\"}\",Text4:\"{\\\"text\\\":\\\"============\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"fill ~ ~ ~-1 ~4 ~2 ~1 air\\\"}}\"}"},{id:commandblock_minecart,Command:"setblock ~1 ~-2 ~ wall_sign 4 0 {Text1:\"{\\\"text\\\":\\\"3 Bock\\\",\\\"color\\\":\\\"dark_blue\\\",\\\"italic\\\":true}\",Text2:\"{\\\"text\\\":\\\"Trampoline\\\",\\\"color\\\":\\\"dark_blue\\\",\\\"italic\\\":true}\",Text3:\"{\\\"text\\\":\\\"by TCSimon\\\",\\\"color\\\":\\\"dark_red\\\"}\",Text4:\"{\\\"text\\\":\\\"\\\"}\"}"},{id:commandblock_minecart,Command:"fill ~3 ~-2 ~ ~4 ~-2 ~ chain_command_block 5"},{id:commandblock_minecart,Command:"setblock ~3 ~-2 ~ repeating_command_block 5"},{id:commandblock_minecart,Command:"blockdata ~4 ~-2 ~ {auto:1,Command:\"execute @a ~ ~ ~ detect ~ ~-2 ~ slime 0 execute @p ~ ~ ~ detect ~ ~-1 ~ air 0 fill ~ ~-5 ~ ~ ~-6 ~ stone 0 \"}"},{id:commandblock_minecart,Command:"blockdata ~3 ~-2 ~ {auto:1,Command:\"execute @a ~ ~ ~ detect ~ ~-1 ~ slime 0 execute @p ~ ~ ~ detect ~ ~-2 ~ sticky_piston 1 setblock ~ ~-3 ~ redstone_block 0 replace air 0\"}"},{id:commandblock_minecart,Command:"setblock ~ ~ ~1 command_block 0 0 {Command:\"fill ~ ~-3 ~-1 ~ ~ ~ air\"}"},{id:commandblock_minecart,Command:"setblock ~ ~-1 ~1 redstone_block"},{id:commandblock_minecart,Command:"kill @e[type=commandblock_minecart,r=1]"}]}]}]}