moving right/left

function love.load()

  enemy = {
    x = 400,
    y = 300,
    w = 100,
    h = 100,

    xAccel = 100,

    distance = 0,
  }

end

function love.update(dt)
  enemy.x = enemy.x+enemy.xAccel*dt
  enemy.distance = enemy.distance+enemy.xAccel*dt

  if math.abs(enemy.distance) >= 250 then
    enemy.distance = 0
    enemy.xAccel = -enemy.xAccel
  end

end

function love.draw()

  love.graphics.setColor(1,1,1)
  love.graphics.print("Walked distance: "..enemy.distance,20,20)

  if enemy.xAccel > 0 then
    love.graphics.print("Facing direction: Right",20,40)
  else
    love.graphics.print("Facing direction: Left",20,40)
  end

  love.graphics.rectangle("fill",enemy.x,enemy.y,enemy.w,enemy.h)

end