text: __author__ = 'Andres'
  
  import math
  import time
  
  
  def sinx(actor, stats):
      t = time.clock() - actor.sign.spawn_time
      actor.centerx -= stats.speed*math.cos(t*math.pi)
  
  
  def siny(actor, stats):
      t = time.clock() - actor.sign.spawn_time
      actor.centery -= stats.speed*math.cos(t*math.pi)
  
  
  def cosx(actor, stats):
      t = time.clock() - actor.sign.spawn_time
      actor.centerx += stats.speed*math.sin(t*math.pi)
  
  
  def cosxx(actor, stats):
      t = time.clock() - actor.sign.spawn_time
      actor.centerx += stats.speed*math.sin(t*math.pi) - t
  
  
  def cosy(actor, stats):
      t = time.clock() - actor.sign.spawn_time
      actor.centery += stats.speed*math.sin(t*math.pi)