Solved Region argument problem

[FireKun]

Hello all of you, I'm trying to make a reset region skript. The idea is the following one:

command /mreset [<text>]:
    trigger:
        if arg 1 is not set:
            send "You must put a region name" to player
        if arg 1 is a region:
            make player execute command "//schem load %arg 1%"
            make player execute command "//copy"
            make player execute command "//paste -o"
            wait 4 ticks
            loop all blocks in the region "%arg 1%":
                if loop-block is stone:
                    if block 1 meter below, above, east, west, north or south loop-block is air:
                    if chance of 20%:
                        set loop-block to lapis lazuli
                    if chance of 10%:
                        set loop-block to coal ore
                    if chance of 5%:
                        set loop-block to iron ore

The problem comes in the 10th line. I don't know how to do for looping the arg 1 without puting the region name directly.

If instead of putting "%arg 1%" I put the region name it works:

command /mreset [<text>]:
    trigger:
        if arg 1 is not set:
            send "Debes poner el nombre de lo que quieres resetear" to player
        if arg 1 is a region:
            make player execute command "//schem load %arg 1%"
            make player execute command "//copy"
            make player execute command "//paste -o"
            wait 4 ticks
            loop all blocks in the region "1":
                if loop-block is stone:
                    if block 1 meter below, above, east, west, north or south loop-block is air:
                    if chance of 20%:
                        set loop-block to lapis lazuli
                    if chance of 10%:
                        set loop-block to coal ore
                    if chance of 5%:
                        set loop-block to iron ore

The first code doesn't work but the second one yes, and I only change de 10th line.

Can someone help me? Thanks.
[doublepost=1570990764,1570975959][/doublepost]Solved.

command /mreset [<region>]:
    trigger:
        if arg 1 is not set:
            send "Debes poner el nombre de lo que quieres resetear" to player
        if arg 1 is a region:
            make player execute command "//schem load %arg 1%"
            make player execute command "//copy"
            make player execute command "//paste -o"
            wait 4 ticks
            loop all blocks in the region arg-1:
                if loop-block is stone:
                    if block 1 meter below, above, east, west, north or south loop-block is air:
                        if chance of 20%:
                            set loop-block to lapis lazuli
                        if chance of 10%:
                            set loop-block to coal ore
                        if chance of 5%:
                            set loop-block to iron ore