cc_tunnel2.0

function step()
    turtle.dig()
    turtle.attack()
    return(turtle.forward())
end

function stepDown()
    turtle.digDown()
    turtle.attackDown()
    return(turtle.down())
end

function stepUp()
    turtle.digUp()
    turtle.attackUp()
    return(turtle.up())
end

function moving(lenght)
    local i = 0
    while i<lenght do
        if step() then
            i = i+1
        end
    end
end

function movingUp(lenght)
    local i = 0
    while i<lenght do
        if stepUp() then
            i = i+1
        end
    end
end

function movingDown(lenght)
    local i = 0
    while i<lenght do
        if stepDown() then
            i = i+1
        end
    end
end

function line(side,lenght)
-- side est un nombre : 0 vers la droite, 1 vers la gauche
    if side == 0 then
        turtle.turnRight()
        moving(lenght)
        turtle.turnLeft()
    else
        turtle.turnLeft()
        moving(lenght)
        turtle.turnRight()
    end
end

function tunneling(lenght)
    local i=0
    while i<lenght do
        line(i%2,lenght)
        movingUp(1)
        i=i+1
    end

    line(i%2,lenght)

    if i%2 == 0 then
        line(1,lenght)
    end
    movingDown(lenght)
    moving(1)
end

function pose()
    turtle.select(1)
    turtle.place()
    local i=2
    while i<16 do
        i=i+1
        turtle.select(i)
        turtle.drop()
    end
    turtle.select(1)
    turtle.dig()
end

function refueling()
    turtle.select(2)
    turtle.place()
    turtle.select(3)
    turtle.suck()
    turtle.refuel(turtle.getItemCount(3))
    turtle.select(2)
    turtle.dig()

end

while 1 do
    tunneling(19)
    turtle.turnLeft()
    turtle.turnLeft()
    pose()
    while turtle.getFuelLevel()<450 do
        refueling()
    end
    turtle.turnLeft()
    turtle.turnLeft()
end