#A
    if lineColor == getPixel(A, 0, 0):
      for x in range (0, aW):
        for y in range(0, h):
          altX = px + x
          if altX >= limitW:
            altX = limitW-1

    #B
    if lineColor == getPixel(B, 0, 0):
      for x in range (0, BW):
        for y in range(0, h):
          altX = px + x
          if altX >= limitW:
            altX = limitW-1