Sponger

-- SPONGER
-- NEEDS TO BE FACING POSITIVE X
sponge_slot = 1
fuel_slot = 2

sponge_distance = 6

move_counter = 79 -- trigger immediately

init_x = 0
init_y = 0
init_z = 0

x = init_x
y = init_y
z = init_z

print("Enter # of blocks\n")
print("forward\n")
sponge_x = tonumber(io.read())
print("Enter # of blocks\n")
print("vertical\n")
print(" (probably negative)\n")
sponge_y = tonumber(io.read())
print("Enter # of blocks\n")
print("to the right\n")
sponge_z = tonumber(io.read())

function sponge_it()
    turtle.dig() -- remove potential block
    turtle.place()
    turtle.dig()
end

function turtle_down()
    if turtle.detectDown() then
        return true
    else
        y = y - 1
        refuel_every_eighty()
        turtle.down()
        return false
    end
end


function refuel_every_eighty()
    move_counter = move_counter + 1
    if move_counter >= 80 then
        move_counter = 0
        if turtle.getItemCount(fuel_slot) <= 1 then -- leave one always
            fuel_slot = fuel_slot + 1
            if fuel_slot >= 17 then
                exit()
            end

        end
        turtle.select(fuel_slot)
        turtle.refuel(1)
        turtle.select(sponge_slot)
    end
end

function sponge_y_way()
    local cant_go_down = false
    for i_sponge_y = 1, math.floor(math.abs(sponge_y / sponge_distance)) do
        for move_y = 1, sponge_distance do
            if sponge_y < 0 then
                cant_go_down = turtle_down()
                if cant_go_down then break end-- if can't go down any further, go back up (for clearing ocean floors)
            else
                y = y + 1
                refuel_every_eighty()
                turtle.up()
            end
        end
        sponge_it()
        if cant_go_down then break end-- if can't go down any further, go back up (for clearing ocean floors)
    end

    for move_y = 1, math.abs(init_y - y) do
        if sponge_y < 0 then
            y = y + 1
            refuel_every_eighty()
            turtle.up()
        else
            y = y - 1
            refuel_every_eighty()
            turtle.down()
        end
    end
end

function sponge_x_way()
    if sponge_x < 0 then
        turtle.turnLeft()
        turtle.turnLeft()
    end

    for i_sponge_x = 1, math.floor(math.abs(sponge_x / sponge_distance)) do
        sponge_it()
        sponge_y_way()
        for move = 1, sponge_distance do
            refuel_every_eighty()
            turtle.forward()
            if sponge_x < 0 then
                x = x - 1
            else
                x = x + 1
            end
        end
    end

    sponge_it()
    sponge_y_way()

    turtle.turnLeft()
    turtle.turnLeft()

    for i = 1, math.abs(init_x - x) do
        refuel_every_eighty()
        turtle.forward()
        if sponge_x < 0 then
            x = x + 1
        else
            x = x - 1
        end
    end

    turtle.turnLeft()
    turtle.turnLeft()
end




function sponge_x_z_way()
    for move_z_i = 1, math.floor(math.abs(sponge_z / sponge_distance)) do
        sponge_x_way()
        if sponge_z < 0 then
            turtle.turnLeft()
        else
            turtle.turnRight()
        end

        for move_z = 1, sponge_distance do
            refuel_every_eighty()
            turtle.forward()

            if sponge_z < 0 then
                z = z - 1
            else
                z = z + 1
            end
        end

        if sponge_z < 0 then
            turtle.turnRight()
        else
            turtle.turnLeft()
        end
        if move_z_i == math.floor(math.abs(sponge_z / sponge_distance)) then
            sponge_x_way()
        end
    end

    if sponge_z < 0 then
        turtle.turnLeft()
    else
        turtle.turnRight()
    end

    for i = 1, math.abs(init_y - y) do
        refuel_every_eighty()
        turtle.forward()
        if sponge_z < 0 then
            z = z + 1
        else
            z = z - 1
        end
    end

    if sponge_z < 0 then
        turtle.turnRight()
    else
        turtle.turnLeft()
    end
end

sponge_x_z_way()