local cache = 0
local cachemov = 2
local x,y,z = 0,0,0
local x1,y1,z1 = 0,0,0
local x2,y2,z2 = 0,0,0
local facing = 0

function ref()
    if turtle.getFuelLevel() < 2 then
        turtle.refuel()
    end
end

function explore()
    while (x < x1) or (x > x2) do
        print("limiteX")
        if (x < x1+2) and (x < x2+2) then
            if facing%4 == 3 then
                moveF()
            else
                turtle.turnLeft()
                facing = facing + 1
            end
        end
        if (x > x1-2) and (x > x2-2) then
            if facing%4 == 1 then
                moveF()
            else
                turtle.turnLeft()
                facing = facing + 1
            end
        end
    end
    while (z < z1) or (z > z2) do
        print("limiteZ")
        if (z < z1+2) and (z < z2+2) then
            if facing%4 == 0 then
                moveF()
            else
                turtle.turnLeft()
                facing = facing + 1
            end
        end
        if (z > z1-2) and (z > z2-2) then
            if facing%4 == 2 then
                moveF()
            else
                turtle.turnLeft()
                facing = facing + 1
            end
        end
    end
    if turtle.detectUp() then
        if y < y2 then
            cachemov = 1
            turtle.digUp()
        end
    end
    if cachemov == 1 then
        turtle.up()
        y = y + 1
        cache = 0
        cachemov = 0
    end
    if turtle.dig() then
        cache = 0
        turtle.dig()
        moveF()
    else
		turtle.turnLeft()
		facing = facing + 1
        cache = cache + 1
    end
     if cache >= 4 then
        if y > 64 then
    	    if turtle.detectDown() then
                if turtle.digDown() then
                y = y - 1
                end
            else
                if turtle.down() then
                    y = y - 1
                end
            end
        end
    	cache = 0
	 end

end

function moveF()
    if turtle.forward() then
        if facing%4 == 0 then
            z = z + 1
        end
        if facing%4 == 3 then
            x = x + 1
        end
        if facing%4 == 2 then
           z = z - 1
        end
        if facing%4 == 1 then
            x = x - 1
        end
        --turtle.forward()
    end
end

while true do
    term.clear()
    print("\n")
    print(x)
    print("\n")
    print(y)
    print("\n")
    print(z)
	while cachemov == 2 do
		print("\nInserte coordena X :")
        x = tonumber(read())
		print("\nInserte coordena Y :")
		y = tonumber(read())
		print("\nInserte coordena Z :")
		z = tonumber(read())
		print("\nInserte coordena +X:")
		x2= tonumber(read())
		print("\nInserte coordena +Y:")
		y2= tonumber(read())
		print("\nInserte coordena +Z:")
		z2= tonumber(read())
		print("\nInserte hacia donde se dirije la cara (0N 3E 2S 1O):")
        facing = tonumber(read())
        sleep(0)
        x1 = x
        y1 = y
        z1 = z
		cachemov = 0
    end
    ref()
    explore()
end