IR sensor for arduino

hi,

I want to make stairs like this: https://www.youtube.com/watch?v=Ir_cqS6oV5U can anyone tell me what IR sensor I should use? I need about 1 meter distance. I found in ebay but distance is to short http://www.ebay.com/itm/290998986489?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2648 or can anyone show schematic for IR sensor to do for my self.

You could use a pressure-mat switch instead of an IR break-beam switch.