tunnler

function checkForGravel()
    local block = turtle.detect(front)
    if(block == true) then
        while(turtle.detect(front) == true) do
            turtle.dig()
        end
    end
end
function tunnel()
    turtle.dig()
    checkForGravel()
    turtle.forward()
    turtle.turnLeft()
    turtle.dig()
    checkForGravel()
    turtle.forward()
    turtle.digUp()
    turtle.up()
    turtle.digUp()
    turtle.up()
    turtle.turnRight()
    turtle.turnRight()
    turtle.dig()
    checkForGravel()
    turtle.forward()
    turtle.dig()
    checkForGravel()
    turtle.forward()
    turtle.digDown()
    turtle.down()
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.dig()
    turtle.digDown()
    turtle.down()
    turtle.forward()
    turtle.turnRight()
end

local count = 0
local back_count = 0
local torch = 0
rednet.open("left")
local sender, message, protocol = rednet.receive("miner")
print(message)
local start = true
while(start) do
    if  message == "start" then
        start = false
    end
end
while(turtle.getItemCount(1) > 0) do
    while(turtle.getItemCount(16) <= 0) do
        print("I have traveled " .. count + 1 .. " blocks")
        tunnel()
            if (torch == 6) then
                turtle.turnLeft()
                turtle.turnLeft()
                turtle.select(1)
                turtle.place()
                turtle.turnLeft()
                turtle.turnLeft()
                torch = 0
                print("Placing a torch")
            end
        count = count + 1
        torch = torch + 1
        print("I have dug out " .. count * 9 .. " blocks")
        if(turtle.getFuelLevel() == 0) then
            print("Refueling!")
            turtle.refuel()
            print("Fuel level at " .. turtle.getFuelLevel())
        end
    end
    turtle.turnRight()
    turtle.turnRight()
    print("Time to go back " .. count .. " blocks")
    turtle.up()
    back_count = count
    while(count > 0) do
        turtle.forward()
        count = count - 1
    end
    turtle.down()
    for i=16,3,-1 do
        turtle.select(i)
        turtle.drop()
    end
    turtle.turnRight()
    turtle.turnRight()
    turtle.up()
    while(back_count > 0) do
        turtle.forward()
        back_count = back_count - 1
    end
    turtle.down()
end
print("All done!")