mmmm.. let's assume that the "noise" will be less than 1 seconde

Code:
TRISB = 1   

ServoInput VAR PORTB.0
rled VAR PORTB.1 ' BIND OUTPUT TO RB1
lled VAR PORTB.2

PORTB=0 ' turn leds off
PAUSE 1000 'boot delay
Start:

if ServoInput then ' same as If ServoInput=1 then
          rled = 1 ' right side led on
          pause 250 ' pause 1/4 second 
          rled = 0 ' right side led off
          pause 250 'pause off
Else
          lled = 1 'left side led on 
          pause 250 'pause 1/4 sec
          lled = 0 ' left led off
          pause 250 'pauses off for 1/4 sec 
endif
goto start
And the time you do the LED blink (500ms) can be enough to avoid some glitchs from servo motor.