How to make a trap block

[zeibo]

I wanna make the cracked stone bricks disappear for a while when someone moves onto them.

But I can't make it happen correctly.

Sometimes the blocks won't spawn at their original position......

on walking on Cracked Stone Bricks:
        send "watch out!" to player
        set {lx.crackedbricks.%player%} to the player's x-coordinate
        set {ly.crackedbricks.%player%} to the player's y-coordinate
        set {lz.crackedbricks.%player%} to the player's z-coordinate
        set {lw.crackedbricks.%player%} to the player's world
        wait 3 tick
        subtract 1 from {ly.crackedbricks.%player%}
        set block at location at {lx.crackedbricks.%player%}, {ly.crackedbricks.%player%}, {lz.crackedbricks.%player%} in world {lw.crackedbricks.%player%} to air
        wait 10 tick
        set block at location at {lx.crackedbricks.%player%}, {ly.crackedbricks.%player%}, {lz.crackedbricks.%player%} in world {lw.crackedbricks.%player%} to Cracked Stone Bricks

 

[ShaneBee]

Okay, so I was trying something similar a lonnnggg time ago, where it would make tnt turn into primed tnt if a player stepped on it.

This may be what you're looking for:

on walking on Cracked Stone Bricks:
    send "Watch Out!" to player
    set event-block to air
    wait 10 ticks
    set event-block to Cracked Stone Bricks

Now, there is a problem with this: if a player is sneaking along the edge of the block, they're technically not walking on it, and thus this event does not get called.

 

[ShaneBee]

Just replace the "walking" to "on sneak toggle"

edit: Not sure.. but hey! Test it.

 

[ShaneBee]

It's just that the event won't be called if the player is able to "hang on" to the edge of the block, since the player technically isn't above the block yet.

A solution, although may cause lag, would be to use the "on any movement" event.