tunnel.lua

---------------functions---------------
---------------------------------------

function percent(current,volume)
    current=current+1
    percent=current/volume*100
    term.clear()
    print("current advencement:", percent,"%")
    return current
end

function height(h,height)
    print(h)
    if h==1 then
        if turtle.detectDown()==false then
            turtle.placeDown()
        end
    elseif h==height then
        if turtle.detectUp()==false then
            turtle.placeUp()
        end

    end

end

function OOF() --out of fuel
    while true do
        term.clear()
        term.setCursorPos(1,1)
        print(" Out of fuel!")
        print(" Place fuel in slot 16")
        turtle.select(16)
        if turtle.getItemCount()>0 then
            prev=turtle.getFuelLevel()
            turtle.refuel(1)
            print("Fuel level:", turtle.getFuelLevel()/(1000).."k")
            if turtle.getItemCount()==0 or turtle.getFuelLevel()>=100000-(turtle.getFuelLevel()-prev) then
                break
            end

        end
        sleep(0.01)

    end

end


--------------main program-------------
---------------------------------------
--terminal clear
term.clear()

--variables
print("enter lenght:")
lenght=tonumber(read())
print("enter width:")
width=tonumber(read())
print("enter height:")
height=tonumber(read())

volume=lenght*width*height
current=0
for l=1,lenght do
    turtle.select(16)
    turtle.drop(turtle.getItemCount())
    if turtle.getFuelLevel()<((height*width)+height+width) then
        OOF() --out off fuel
    end

    turtle.dig()
    current=percent(current,volume)
    turtle.forward()
    turtle.turnRight()
    if turtle.detect()==false then
        turtle.place()
    end

    for i=1,height do
        h=i
        for w=1,width-1 do


            turtle.dig()
            current=percent(current,volume)
            turtle.forward()

            height(i)
        end

        if turtle.detect()==false then
            turtle.place()
        end

        if i~=height then
            turtle.digUp()
            current=percent(current,volume)
            turtle.up()
            if turtle.detect()==false then
                turtle.place()
            end

            turtle.turnLeft()
            turtle.turnLeft()
        end

    end

    if height%2==0 then
        for i=1, height do
            turtle.down()
        end

    else
        for i=1, height do
            turtle.down()
        end

        turtle.turnLeft()
        turtle.turnLeft()
        for i=1,witdh-1 do
            turtle.forward()
        end

    end

    turtle.turnRight()
end