test

function isTurtle(direction)
    local success, data
    if direction == "front" then
        success, data = turtle.inspect()
    elseif direction == "down" then
        success, data = turtle.inspectDown()
    else
        success, data = turtle.inspectTop()
    end

    if success then
        return data.name == "ComputerCraft:CC-Turtle"
    end
    return false
end

if isTurtle("down") then
    print("Turtle !")
end