chunk

local x=0
local y=0
if #arg == 2 then
    x=tonumber(arg[1])
    y=tonumber(arg[2])
else
    return
end

for j=1,y do
    for i=1,x do
        turtle.dig()
        turtle.forward()
        turtle.digUp()
    end
    if j<y then
        if j%2==1 then
            turtle.turnRight()
        else
            turtle.turnLeft()
        end
        turtle.dig()
        turtle.forward()
        turtle.digUp()
        if j%2==1 then
            turtle.turnRight()
        else
            turtle.turnLeft()
        end
    end
end