Stripmine

local deep
local far

print("How deep per tunnel?")
deep = tonumber(io.read())
print("How many do you want?")
far = tonumber(io.read())
print("pls give me Torches into inv.2 and chests in inv.3")
io.read()

function Check()
    if(turtle.getItemCount(2)>=far) then
        textutils.slowPrint("You have given me enough torches thx <3")
    else
        textutils.slowPrint("I NEED MORE TORCHES")
        os.shutdown()
    end
    if(turtle.getItemCount(2)>=2) then
        textutils.slowPrint("THX for the chests")
    else
        textutils.slowPrint("I NEED CHESTS inv 3")
    end
end

function Strip(dep)
    if turtle.getFuelLevel() <= 2 then
        write("Fuel low")
        Refuel()
    end
    turtle.turnLeft()
    for i=1,dep do
        Dig()
        DigUp()
        Forward()
    end
    DigUp()
    turtle.turnLeft()
    turtle.turnLeft()
    for i=2,dep do
        Forward()
    end
    for i=1,dep do
        Dig()
        DigUp()
        Forward()
    end
    DigUp()
end

function Refuel()
    turtle.select(1)
    turtle.refuel(20)
    for i=4,16 do
        turtle.select(i)
        turtle.refuel()
    end
    turtle.select(1)
end

function InvFull()
    if(turtle.getItemCount(16)>=1) then
        print("Invetory DUMP")
        turtle.select(3)
        turtle.digDown()
        turtle.placeDown()
        os.sleep(1)
        for inv=4,16 do
            turtle.select(inv)
            turtle.dropDown()
        end
    end
    turtle.select(1)
end

function Dig()
    while(turtle.detect()) do
        turtle.dig()
    end
end

function DigUp()
    while(turtle.detectUp()) do
        turtle.digUp()
    end
end

function Forward()
    if(turtle.detectDown()) then
        turtle.forward()
    else
        turtle.select(4)
        turtle.placeDown(4)
        turtle.select(1)
        turtle.forward()
    end
end

function fackel()
    turtle.up()
    turtle.select(2)
    turtle.placeDown()
    turtle.select(1)
    Dig()
    Forward()
    turtle.digDown()
    turtle.down()
end

function Gang()
    Strip(deep)
    turtle.turnLeft()
    turtle.turnLeft()
    for i=2,deep do
        Forward()
    end
    turtle.turnRight()
    fackel()
    InvFull()
    Dig()
    DigUp()
    Forward()
    Dig()
    DigUp()
    Forward()
end

Check()


for i=1,far do
    print("FUEL: "..turtle.getFuelLevel())
    write("Gang: "..i)
    Gang()
end