go.lua

local colors = {1, 5, nil, nil,
 6, nil, nil, 3,
 2, nil, nil, nil,
 nil, nil, 0, 4}
--colors[a+1]
local waitingRotate = false
local numberOfAction = nil

local function emptyFunction()
end
local function choose1()
    return turtle.turnLeft
end
local function choose2()
    return turtle.turnRight
end
local function choose3()
    a = math.random(2)
    if (a == 1) then return emptyFunction
    else return turtle.turnLeft
    end
end
local function choose4()
    a = math.random(2)
    if (a == 1) then return emptyFunction
    else return turtle.turnRight
    end
end
local function choose5()
    a = math.random(2)
    if (a == 1) then return turtle.turnLeft
    else return turtle.turnRight
    end
end
local actions = {choose1, choose2, choose3, choose4, choose5}

while true do
    _, block = turtle.inspectDown()
    if (block.name == "minecraft:wool") then
        action = colors[block.metadata + 1]
    else action = nil;
    end
    if (action ~= nil) then
        if (action == 0) then
            write("Let`s go "..tostring(action).."\n")
            if (a ~= nil) then
                a()()
            end
            waitingRotate = false;
        elseif (action >= 1 and action <=5) then
            write("I need to go deeper "..tostring(action).."\n")
            a = actions[action]
            waitingRotate = true
        elseif (action == 6) then
            write("I need rotate "..tostring(action).."\n")
            turtle.turnLeft()
            turtle.turnLeft()
        end
    end
    if (action == nil) then
        waitingRotate = false
    end
    turtle.forward();
    --sleep(1)
end