Mining v1.8

near=true
blocksTravelled = 0

function mine(num)
    for i=0, num, 1 do
    while turtle.detectUp() do
            turtle.digUp()
    end
    while turtle.detect() do
            turtle.dig()
    end
        turtle.forward()
    end
end

function checkInventory()
    if turtle.getItemCount(8) > 0 then
        dropOff()
    end
end

function dropOff()
    for i=0, blocksTravelled - 3, 1 do
    turtle.forward()
    end
    if not near then
    turtle.turnLeft()
    for i=0, 16, 1 do
        turtle.forward()
    end
    turtle.turnRight()
    end
    sleep(10)
    turtle.turnRight()
    turtle.turnRight()
    if not near then
    turtle.turnLeft()
    for i=0, 16, 1 do
        turtle.forward()
    end
    turtle.turnRight()
    end
    for i=0, blocksTravelled - 3, 1 do
    turtle.forward()
    end
end

for i=0, 10, 1 do
    turtle.turnLeft()
    mine(16)
    near = false
    turtle.turnLeft()
    mine(3)
    --checkInventory()
    turtle.turnRight()
    turtle.turnRight()
    mine(6)
    blocksTravelled= blocksTravelled + 3
    turtle.turnRight()
    mine(16)
    near = true
    turtle.turnRight()
    mine(3)
    --checkInventory()
    turtle.turnLeft()
    turtle.turnLeft()
    mine(6)
    blocksTravelled= blocksTravelled + 3
end