Portalbuilder

function refill()

    turtle.turnRight()
    turtle.turnRight()

        turtle.select(1)
        while turtle.getItemCount(15) < 64 do

        turtle.suck()

        end
    turtle.turnLeft()
    turtle.turnLeft()

        turtle.select(15)

end

function horizontal()


    checkBlocks()

    for i = 1, x do

    for i = 1, 3 do

      turtle.up()
      turtle.place()

    end

    turtle.up()

    end

  for i = 1, (x*4) do

    turtle.down()

  end

end

function checkBlocks()

    if turtle.getItemCount(s) < 5 then

            s = s - 1
            turtle.select(s)

    end

end

function footnhead()

  for i = 1, x do

        checkBlocks()

    turtle.place()

    for i = 1, 4 do

      turtle.up()

    end

    turtle.place()


  end

  turtle.turnRight()
  turtle.forward()
  turtle.turnLeft()

  for i = 1, x do

    turtle.place()

    for i = 1, 4 do

      turtle.down()

    end

    turtle.place()

  end

end

function depth()

    checkBlocks()

    turtle.turnRight()
    turtle.forward()
    turtle.turnLeft()
    turtle.forward()
    turtle.forward()
    turtle.turnLeft()

    for i = 1, y do

        for i = 1, z do
            footnhead()
            turtle.up()

            for i = 1, 3 do

                turtle.forward()

            end

            turtle.down()
            turtle.turnLeft()
            turtle.forward()
            turtle.turnRight()

        end

        footnhead()
        turtle.up()

        for i = 1, z * 3 do

            turtle.back()

        end

        turtle.turnRight()
        turtle.forward()
        turtle.forward()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnLeft()
        turtle.down()

        for i = 1, z do

        horizontal()

      turtle.turnRight()
      turtle.forward()
      turtle.turnLeft()

        footnhead()

        turtle.turnRight()
      turtle.forward()
      turtle.turnLeft()

        end

        horizontal()
        turtle.turnRight()

        for i = 1, z * 3 + 1 do

            turtle.back()

        end

    end

end

function portal()

    for i = 1, z do

        horizontal()

      turtle.turnRight()
      turtle.forward()
      turtle.turnLeft()

        footnhead()

        turtle.turnRight()
      turtle.forward()
      turtle.turnLeft()

    end

    horizontal()
    depth()

    turtle.turnRight()
    turtle.forward()
    turtle.turnLeft()

    for i = 1, y * 4 do

        turtle.forward()

    end

    turtle.forward()
    turtle.turnLeft()
    turtle.forward()
    turtle.turnLeft()
end

s = 15

print("Enter height: ")
x = io.read()
print("Enter width: ")
z = io.read()
print("Enter depth: ")
y = io.read()

if turtle.getItemCount(1) < x*8 then

    refill()

end
turtle.select(15)
portal()