test

while true do

function refuel()

    if turtle.getFuelLevel() < 50 then
        turtle.select(16)
        turtle.placeUp()
        turtle.suckUp()
        turtle.refuel()
        turtle.dropUp()
        turtle.digUp()
        turtle.select(1)
    end
end

function refill()

    if  turtle.getItemCount(1) == 0 then
        turtle.select(15)
        turtle.placeUp()
        turtle.select(1)
        turtle.suckUp()
        turtle.select(15)
        turtle.digUp()
        turtle.select(1)
    end
end

function (testground)

    if turtle.detectDown() == false then
        turtle.placeDown()
    end
    if turtle.detectDown() == true then
        andarfrente()
    end

function testsides()

        turtle.turnLeft()
    if  turtle.detect() == true then
        turtle.turnRight()
        turtle.turnRight()
        turtle.forward()
        turtle.turnLeft()
        testground()
    end

    turtle.turnRight()
    if turtle.detect() == true then
        turtle.turnLeft()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnRight()
        testground()
    end
end

function andarfrente()

    if turtle.detect() == false then
        turtle.forward()
    end

    if turtle.detect() == true then
        testsides()
    end
end


function andar()

if turtle.getItemCount(1) > 0 then
    refuel()
    testground()
end
    end

refuel()
refill()
andar()

end