Solved How to toggle this?

[JustADev]

How do I make a toggle gui for this?
So that if staff want to build they can called /buildmode

on place of planks:0:
add location of event-block to {locations::*}
on place of oak log:
add location of event-block to {locations::*}
on place of water:
add location of event-block to {locations::*}
on place of fire:
add location of event-block to {locations::*}

command /regen:
trigger:
wait 1 tick
loop {locations::*}:
set block at loop-value to air

every 5 seconds:
make console execute command "regen"
stop

Second question, how do i make the blocks disappear only 5 seconds AFTER the player has placed them instead of every 5 secs.

 

[Deleted member 5254]

This should do it for your number 2

On block place:
    If event-block is YourBlock:
        Wait 5 seconds
        Set event-block to air