Skript to big?

[BedorvePeer]

So i made a enchant skript that when you mine it mines all of the blocks i said need to be but is it to mutch cuz when i mine i lagg and the server crashes. Server should need to bhe good enough. is there anyway to get it smaller maby or to let it lagg less?

on mine:
    lore of player's tool contains "&7Miner 4"
    set {_1} to location of event-block
    set {_2} to location of event-block
    add 2 to x-coord of {_1}
    subtract 2 from x-coord of {_2}    
    add 1 to z-coord of {_1}
    subtract 1 from z-coord of {_2}
    loop blocks within {_1} to {_2}:
        set loop-block to air
        set {_3} to location of event-block
        set {_4} to location of event-block
        add 2 to z-coord of {_3}
        subtract 2 from z-coord of {_4}    
        add 1 to x-coord of {_3}
        subtract 1 from x-coord of {_4}
        loop blocks within {_3} to {_4}:
            set loop-block-2 to air
            set {_5} to location of event-block
            set {_6} to location of event-block
            add 1 to z-coord of {_5}
            subtract 1 from z-coord of {_6}    
            add 1 to x-coord of {_5}
            subtract 1 from x-coord of {_6}
            add 1 to y-coord of {_5}
            subtract 1 from y-coord of {_6}
            loop blocks within {_5} to {_6}:
                set loop-block-3 to air
                set {_7} to location of event-block
                set {_8} to location of event-block
                add 3 to x-coord of {_7}
                subtract 3 from x-coord of {_8}
                loop blocks within {_7} to {_8}:
                    set loop-block-4 to air
                    set {_9} to location of event-block
                    set {_10} to location of event-block
                    add 3 to z-coord of {_9}
                    subtract 3 from z-coord of {_10}
                    loop blocks within {_9} to {_10}:
                        set loop-block-5 to air
                        set {_11} to location of event-block
                        set {_12} to location of event-block
                        add 1 to y-coord of {_11}
                        subtract 1 from y-coord of {_12}
                        add 2 to z-coord of {_11}
                        subtract 2 from z-coord of {_12}
                        loop blocks within {_11} to {_12}:
                            set loop-block-6 to air

 

[Reygon]

The loops are looping themselves, you don't have the indents going back to the original ones, so basically, you're running those last lines of code 244140625 times.