Help with block regeneration

[ZushiYum]

Hello so i need help making a area that randomly generates brown carpet and mostly air from the coordinates 34, 147, 19 to 21, 147, 27 i will be greatfull for any advice or help

 

[Meggy_Mode]

use perlin noise, it work pretty well and you can find a good example with a little googling.
also to set blocks set block at location(50, 50, 50, "world") to dirt <-- should work

or if you just want to modify this (may or may not work, I have not tested it yet)

command /goldterrain:
    trigger:
        set {_size} to 50 # size of the terrain (50x50)
        set {_scale} to 10 # smoothness (higher = smoother terrain)
        set {_amplitude} to 10 # height variation

        loop {_x} from 0 to {_size}:
            loop {_z} from 0 to {_size}:
                set {_value} to (loop-value-1 + 0.1) / {_scale}
                set {_value2} to (loop-value-2 + 0.1) / {_scale}
                set {_noise} to sin({_value}) + cos({_value2})

                set {_y} to round({_noise} * {_amplitude}) + 64

                set block at location(loop-value-1, {_y}, loop-value-2, "world") to gold block