a tortoroise digging parallelepipeds

t=turtle

function detect()
    while t.detect() do
        t.dig()
    end
    while t.detectUp() do
        t.digUp()
    end
end

function dig()
    t.digUp()
    t.dig()
    t.digDown()
    detect()
    chest()
    t.forward()
end

function digger()
    if p==1 then t.turnRight() else t.turnLeft() end
    x=x-1
    while x>0 do
        x=x-1
        dig()
        chest()
    end
    y=y-1
    x=ox
    t.digUp()
    t.digDown()
    if y>0 then
        if p==1 then t.turnLeft() else t.turnRight() end
        dig()
    else t.down()
        t.digDown()
        t.down()
        t.digDown()
        t.down()
        y=oy
        z=z-3
        if p==0 then t.turnLeft() p=1 else t.turnRight() p=0 end
    end

    if p==1 then p=0 else p=1 end
    fuel()
end

function drop()
    t.select(16)
    t.place()
    for i=1,14 do
        t.select(i)
        t.drop()
    end
    t.select(1)
    fuel()
end

function chest()
    if t.getItemCount(14)>0 then
        if p==1 then
        t.turnRight()
        drop()
        t.turnLeft()
        else
        t.turnLeft()
        drop()
        t.turnRight()
        end
    end
end



function clear()
    term.clear()
    term.setCursorPos(1,1)
end

function fuel()
    if t.getFuelLevel() < x*y then print("Refuel") t.select(15)
        while t.getFuelLevel() < x*y do
            t.refuel(1)
        end
    end
    t.select(1)
end



clear()
print("Width")
ox=read()
ox=tonumber(ox)
print("Length")
oy=read()
oy=tonumber(oy)
print("Height ( multiple 3 )")
z=read()
z=tonumber(z)
x=ox
y=oy
fuel()
p=1
while z>0   do
    digger()
end