quarryDigger

local x, y, z
local width, length, depth = 0, 0, 0
local xPos, yPos, zPos = 0, 0, 0
function digLevel(w, l, d)
x=0
y=0
z=0
    turtle.down()
    while z < tonumber(d) do
        while x < tonumber(w) do
   if y > 0 then
            while y< tonumber(l) do
                digOn()
                y = y + 1
            end
   else
     while y>0 do
       digOn()
       y=y-1
     end
   end
            newRow(y)
            x=x+1
        end
        goDown(x,y)
        x=0
        y=0
    end
   end

function newRow(yy)
    turtle.digDown()
    if yy>1 then
        turtle.turnRight()
    else
        turtle.turnLeft()
    end
    turtle.forward()
    turtle.digDown()
    if yy>1 then
        turtle.turnRight()
    else
    turtle.turnLeft()
    end
end

function digOn()
    turtle.digDown()
    turtle.forward()
end

function goDown(xx,yy)
    if yy>1 then
        turtle.turnRight()
        while yy > 0 do
            turtle.forward()
            yy=yy-1
        end
        turtle.turnLeft()
    else
        turtle.turnRight()
    end

    while xx > 0 do
        turtle.forward()
        xx = xx - 1
    end
    turtle.down()
    turtle.digDown()
    turtle.turnRight()
end

term.write("What is the width of your quarry? ")
width = read()
term.write("What is the length of your quarry? ")
length = read()
term.write("How deep? ")
depth = read()
digLevel(width, length, depth)