cc

function start()

    moveFw(3)

    turtle.turnRight()
    moveFw(1)

   plantRow()

    for i=2, 4 do
        if(i%2 == 0) then
            turtle.turnLeft()
            moveFw(4)
            turtle.turnLeft();
        else
            turtle.turnRight()
            moveFw(4)
            turtle.turnRight();
        end
        plantRow()
    end
end

function plantRow()
    placeTree()

    for i=1, 3 do
        moveFw(3)
        placeTree()
    end
    moveFw(1);
end

function moveFw(distance)
    if distance ~= nil then
        distance = tonumber (distance) -- make it a number
        for i = 1, distance do
            turtle.forward()
        end
    else
        print ("Did not specify distance.")
    end
end
function placeTree()
    turtle.select(3)
    turtle.place(Sapling)
    turtle.forward()
    turtle.select(4)
    turtle.place(Torch)
end


function refuel()
    turtle.select(16)
    turtle.refuel(5)
end

function checkFuel()
    local fuel = turtle.getFuelLevel()

    if (fuel < 10) then
        return false
    end
    return true
end

refuel()
start()