Miner

cords = {}
cords["X"] = {}
cords["X"] = 0
cords["Y"] = {}
cords["Y"] = 0
sessioncount = 0
function checkFuel()
while range()>turtle.getFuelLevel() do
        for C = 1,16 do
    G = turtle.getItemDetail(C)
    if G["name"] == "minecraft:coal" then
    turtle.refuel(G["count"])
    end
    end
    end

end

function range()
return cords["X"] + cords["Y"]
end

function mine()
turtle.dig()
    turtle.digUp()
    turtle.up()
    checkFuel()
        turtle.dig()
        turtle.digUp()
        turtle.up()
        checkFuel()
            turtle.dig()
            checkFuel()
        turtle.digDown()
        turtle.down()
        checkFuel()
    turtle.digDown()
    turtle.down()
    checkFuel()
turtle.turnLeft()
turtle.dig()
    turtle.digUp()
    turtle.up()
    checkFuel()
        turtle.dig()
        turtle.digUp()
        turtle.up()
        checkFuel()
            turtle.dig()
            checkFuel()
        turtle.digDown()
        turtle.down()
        checkFuel()
    turtle.digDown()
    turtle.down()
    checkFuel()
turtle.turnRight()
turtle.turnRight()
turtle.dig()
    turtle.digUp()
    turtle.up()
    checkFuel()
        turtle.dig()
        turtle.digUp()
        turtle.up()
        checkFuel()
            turtle.dig()
            checkFuel()
        turtle.digDown()
        turtle.down()
        checkFuel()
    turtle.digDown()
    turtle.down()
    checkFuel()
forward()
forward()
forward()
go()
else
forward()
go()
end
end
end

function updateCords(x,y)
cords["X"] = x + cords["X"]
cords["Y"] = y + cords["Y"]
end

function goHome()
if cords["X"] < 0 then
turtle.turnRight()
elseif cords["X"] == 0 then
else
turtle.turnLeft()
end

dist = math.abs(cords["X"])
for X = 1, dist do
turtle.dig()
turtle.forward()
end

if cords["Y"] < 0 then
ydist = math.abs(cords["Y"])
turtle.turnLeft()
turtle.turnLeft()
for Y = 1,ydist do
turtle.dig()
turtle.forward()
end
else
ydist = math.abs(cords["Y"])
for Y = 1,ydist do
turtle.dig()
turtle.forward()
end
end
end

function go()
mine()
sessioncount = sessioncount + 1
forward()
end


function forward()
if sessioncount <= 100 then
turtle.forward()
go()
else
goHome()
end
end