scoreboard objectives add cd dummy

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scoreboard players random @e[type=armor_stand] cd 0 2

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execute @e[scores={cd=1}] ~~~tp @s ~~~~90

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execute @e[scores={cd=2}] ~~~tp @s ~~~~-90

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execute @e[type=armor_stand] ~~~detect ^^1^2 ice 0 fill ^^^1 ^^1^2 air

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execute @e[type=armor_stand] ~~~tp @s ^^^2

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execute @e[type=armor_stand] ~~~detect ^2^1^ air 0 execute @s ~~~ detect^-2^1^ air 0 execute @s ~~~detect ^^1^-2 air 0 execute @s ~~~ detect ^^1^1 air 0 execute @s~~~detect ^^-1^2 concrete 5 fill ^^-1^ ^^-1^1 concrete 0

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execute @e[type=armor_stand] ~~~tp @s ^^^2