temp

width=40
depth=16
for i=1,width do
    for j=1,depth do
        turtle.dig()
        if j < depth then turtle.forward() end
    end
    if (i % 2 == 0) then
        turtle.turnRight()
        turtle.dig()
        turtle.forward()
        turtle.turnRight()
    else
        turtle.turnLeft()
        turtle.dig()
        turtle.forward()
        turtle.turnLeft()
    end
end