minerbot1.5

local function checkFuel()
    turtle.select(1)
    while turtle.getFuelLevel() < 100 do
        turtle.refuel(1)
    end

end

local function forwardcheck()
    checkFuel()
    while not turtle.forward() do
        turtle.dig()
    end
end

local function startime()
    term.clear()
    print("Welcome to MinerBot2.0\n\n")
    print("Please place me to the left side of your new tunnel one block up facting the wall.\n\n")
    print("Place fuel in slot 1 and a chest in slot 2.")
    print("Enter the width you want your new tunnel... ")
    wth = tonumber(read())
    print("Enter the lenght you want your new tunel... ")
    lgh = tonumber(read())
    print("Number of offset block to right, enter 0 to end at same square as start... ")
    offSet = tonumber(read())
    print("Number of shafts to dig...")
    shaftNumber = tonumber(read())
end

local function mineLeft()
    local x = wth - 1
    turtle.dig()
    forwardcheck()
    turtle.digUp()
    turtle.digDown()
    turtle.turnRight()
    for i=1,x do
        turtle.dig()
        forwardcheck()
        turtle.digUp()
        turtle.digDown()
    end
    turtle.turnLeft()
    wSide = not wSide
end

local function mineRight()
    local x = wth - 1
    turtle.dig()
    forwardcheck()
    turtle.digUp()
    turtle.digDown()
    turtle.turnLeft()
    for i=1,x do
        turtle.dig()
        forwardcheck()
        turtle.digUp()
        turtle.digDown()
    end
    turtle.turnRight()
    wSide = not wSide
end

local function goHome()
    if wSide then
        turtle.turnRight()
        turtle.turnRight()
        for i=1,lgh do
            forwardcheck()
        end
    else
        turtle.turnLeft()
        for i=1,(wth-1) do
            forwardcheck()
        end
        turtle.turnLeft()
        for i=1,lgh do
            forwardcheck()
        end
    end
    turtle.turnRight()
    turtle.turnRight()
end

local function offSetF()
    turtle.turnRight()
    for i=1,offSet do
        forwardcheck()
    end
    turtle.turnLeft()
end

local function digTime()
    for i=1,lgh do
        if wSide then
            mineLeft()
        else
            mineRight()
        end
    end
end

local function placeItems()
    turtle.digDown()
    turtle.select(2)
    turtle.placeDown()
    for x=3,16 do
            turtle.select(x)
            turtle.dropDown()
    end
end


startime()
for t=1,shaftNumber do
    wSide = true
    digTime()
    goHome()
    placeItems()
    offSetF()
end