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 getFace()
    file =fs.open("/cords/face.txt", "r")
    face = tonumber( file.readLine() )
    file.close()
    return face
end