Mining v1.4

near=true
blocksTravelled = 0

function mine(num)
    for i=0, num, 1 do
        turtle.digUp()
        turtle.dig()
        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


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