Move

function forward(nb)
i = 0
    while i<nb do
    local success, data = turtle.inspect()
        if success then
        turtle.dig()
        turtle.forward()
        else
        turtle.forward()
        end
    i = i+1
    end
end

function up(nb)
i = 0
    while i<nb do
    local success, data = turtle.inspect()
        if success then
        turtle.digUp()
        turtle.up()
        else
        turtle.up()
        end
    i = i+1
    end
end

function down(nb)
i = 0
    while i<nb do
    local success, data = turtle.inspect()
        if success then
        turtle.digDown()
        turtle.down()
        else
        turtle.down()
        end
    i = i+1
    end
end