[Creative] chunkCleaner

local args = {...}
local range,heightLimit = 16, 126
if args and #args>=1 then
  if args[1]=="help" then
    print([[chunkCleaner <range> <heightLimit>
  <range>: (num) distance in meters (default: 16)
  <heightLimit>: (num) ceil effect on vertical axis (default: 126)

Clear chunk surrounding Command computer's chunk position.
Effect between Command computer Y position and <heightLimit>
Skip Command computer's chunk position.
Could remove bedrock. To keep nether's ceiling set heightLimit to 126.]])
    return
  else
    range = tonumber(args[1]) or 16
  end
end
if args and #args>=2 then
  heightLimit = tonumber(args[2]) or 126
end

local baseX,baseY,baseZ = commands.getBlockPosition()

local function chunkOrigin(_x,_y,_z)
  return _x-(_x%16),_y-(_y%16),_z-(_z%16)
end

local function clearChunk(_x,_y,_z)
  local oX,oY,oZ = chunkOrigin(_x,_y,_z)
  local _y = baseY
  local _,cursorY = term.getCursorPos()
  while _y <= heightLimit do
    sleep(.1)
    term.setCursorPos(1,cursorY)
    term.clearLine()
    term.write("y:".._y)
    commands.fill(
      oX,
      math.min(heightLimit, _y),
      oZ,
      oX+15,
      math.min(heightLimit, _y+63),
      oZ+15,
      "minecraft:air"
    )
    _y = _y+64
  end
  print("")
end

local z = baseZ-range
while z<baseZ+range do
  local x = baseX-range
  while x<baseX+range do
    if  baseX >= x and baseX <= x+15
    and baseZ >= z and baseZ <= z+15
    then
      print("Skip command chunk")
    else
      print(string.format("Clearing chunk x:%d, y:%d, z:%d",x,baseY,z))
      clearChunk(x,baseY,z)
    end
    x = x + 16
    sleep(.5)
  end
  z = z +16
end