chop.lua

local face = 1

function chop()
    save()
    restock()

    turtle.up()

    for i=1, 34/2 do
        go()
        tree()
        go()
    end

    left()
    go()
    go()
    go()
    left()

    for i=1, 34/2 do
        go()
        tree()
        go()
    end

    turtle.down()
    dropAll()
    left()
    go()
    go()
    go()
    left()

end

function left()
    file =fs.open("/cords/face.txt", "w")
    turtle.turnLeft()
    face = (face-1) % 4
    file.writeLine(face)
    file.close()
end

function right()
    file =fs.open("/cords/face.txt", "w")
    turtle.turnRight()
    face = (face+1) % 4
    file.writeLine(face)
    file.close()
end


function go()
    turtle.dig()
    turtle.digUp()
    turtle.forward()
end

function tree()
    turtle.select(13)
    if not turtle.compareDown() then
        turtle.digDown()
        turtle.placeDown()
    end
    turtle.select(1)
    if turtle.detectUp() then
        local n = 0
        for i=1, 5 do
            if not turtle.detectUp() then
                break
            end
            n = n + 1
            turtle.digUp()
            turtle.up()
        end
        for i=1, n do
            turtle.down()
        end
    end
end

function restock()
    right()
    right()
    turtle.select(13)
    turtle.suck( 64 - turtle.getItemCount(13) )
    right()
    turtle.forward()
    left()
    if turtle.getFuelLevel() < 500 then
    while turtle.getFuelLevel() < 2000 do
        turtle.select(9)
        turtle.suck(1)
        turtle.refuel()
    end end
    left()
    turtle.forward()
    left()
end

function dropAll()
    for slot=1, 16 do
        if slot ~= 13 then
            turtle.select(slot)
            turtle.drop()
        end
    end
end

function save()
    x, y, z = gps.locate()
    file = fs.open("/cords/chopStart.txt", "w")
    file.writeLine(x)
    file.writeLine(y)
    file.writeLine(z)
    file.close()
end

return chop()